Journal ArticleComputing and Software for Big Science · December 1, 2025
The ATLAS Google Project was established as part of an ongoing evaluation of the use of commercial clouds by the ATLAS Collaboration, in anticipation of the potential future adoption of such resources by WLCG grid sites to fulfil or complement their comput ...
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Journal ArticlePhysical review letters · December 2025
A search for the dimuon decay of the Higgs boson is presented based on pp collision data recorded by ATLAS during Run 3 of the Large Hadron Collider, corresponding to an integrated luminosity of 165 fb^{-1} at sqrt[s]=13.6 TeV. To enhance the sensitivity ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · December 1, 2025
Measurements of jet substructure in Pb+Pb collisions provide key insights into the mechanism of jet quenching in the hot and dense QCD medium created in these collisions.This Letter presents a measurement of the suppression of large-radius jets with a radi ...
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Journal ArticlePhysical Review D · November 24, 2025
This article reports on a search for dijet resonances using 132 fb−1 of pp collision data recorded at (Formula presented) ¼ 13 TeV by the ATLAS detector at the Large Hadron Collider. The search is performed solely on jets reconstructed within th ...
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Journal ArticlePhysical Review D · November 7, 2025
A search for events with one displaced vertex from long-lived particles using data collected by the ATLAS detector at the Large Hadron Collider is presented, using 140 fb−1 of proton-proton collision data at (Formula presented) ¼ 13 TeV recorded ...
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Journal ArticleJournal of High Energy Physics · November 1, 2025
On the original published paper the symbol l was not rendered correctly in following plots: • Figure 4: x-axis names • Figures 5(a)–5(d): region name • Figures 2, 3, 10(a) and 10(b): x-axis and region names The originally published wrong file has been repl ...
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Journal ArticleEuropean Physical Journal C · November 1, 2025
A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, continuous corrections to the b-jet, c-jet, and light-flavour jet classification probabilities from jet ...
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Journal ArticleJournal of High Energy Physics · November 1, 2025
Measurements of integrated and differential cross-sections for W±Z production in proton-proton collisions are presented. The data collected by the ATLAS detector at the Large Hadron Collider from 2015 to 2018 at a centre-of-mass energy of s=13 T ...
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Journal ArticleEuropean Physical Journal C · November 1, 2025
A search for pair-production of vector-like leptons is presented, considering their decays into a third-generation Standard Model (SM) quark and a vector leptoquark (U1) as predicted by an ultraviolet-complete extension of the SM, referred to as the ‘4321’ ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 1, 2025
A measurement of off-shell Higgs boson production is performed in the H * → WW channel. The measurement uses a proton–proton collision dataset with an integrated luminosity of 140 fb−1 collected at a centre-of-mass energy of 13 TeV by the ATLAS ...
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Journal ArticleJournal of High Energy Physics · November 1, 2025
Corrections to two figures are noted. In the presentation of exclusion limits for the axion-like particle models, the branching ratio for the decay of the associated W and Z bosons into electron or muon final states was not factored out. For the associated ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 1, 2025
This letter reports the measurement of double parton scattering in same-sign W boson pair production with the ATLAS detector. The data set used corresponds to an integrated luminosity of 140 fb−1 of proton–proton collisions at a center-of-mass e ...
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Journal ArticlePhysical Review D · October 17, 2025
A search for exotic decays of the Higgs boson H into new scalar or pseudoscalar particles that subsequently decay into b-quarks is presented. The search considers ZH production with several decay scenarios for the Higgs boson; first to a pair of identical ...
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Journal ArticleJournal of High Energy Physics · October 1, 2025
The production cross-section of high-mass τ-lepton pairs is measured as a function of the dilepton visible invariant mass, using 140 fb−1 of s=13 TeV proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider. The ...
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Journal ArticleJournal of High Energy Physics · October 1, 2025
The CP properties of the Higgs boson are studied in the vector-boson fusion production mode. The analysis exploits the decay mode of the Higgs boson into two τ-leptons using 140 fb−1 of proton-proton collision data at s=13 TeV collected by the A ...
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Journal ArticleJournal of High Energy Physics · October 1, 2025
A search for the production of a Higgs boson in association with a single top quark, tH, is presented. The analysis uses proton-proton collision data corresponding to an integrated luminosity of 140 fb−1 at a centre-of-mass energy of 13 TeV, col ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 1, 2025
A search for decays of the Higgs boson into a Z boson and a light resonance, with a mass of 0.5–3.5 GeV, is performed using the full 140 fb−1 dataset of 13 TeV proton–proton collisions recorded by the ATLAS detector during LHC Run 2. Leptonic de ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 1, 2025
Measurements of jet substructure are key to probing the energy frontier at colliders, and many of them use track-based observables which take advantage of the angular precision of tracking detectors. Theoretical calculations of track-based observables requ ...
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Journal ArticlePhysical review letters · September 2025
This Letter reports the first evidence of electroweak production of same-sign W boson pairs where at least one of the W bosons is longitudinally polarized and the most stringent constraint to date for the production of two longitudinally polarized same-sig ...
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Journal ArticleJournal of High Energy Physics · September 1, 2025
A search is performed for dark matter particles produced in association with a resonant pair of Higgs bosons using 140 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the Large Hadron Colli ...
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Journal ArticleEuropean Physical Journal C · September 1, 2025
The jet energy calibration and its uncertainties are derived from measurements of the calorimeter response to single particles in both data and Monte Carlo simulation using proton–proton collisions at s=13 TeV collected with the ATLAS detector during Run 2 ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 1, 2025
The mass of the top quark is measured using top-quark-top-antiquark pair events with high transverse momentum top quarks. The dataset, collected with the ATLAS detector in proton–proton collisions at s=13 TeV delivered by the Large Hadron Collider, corresp ...
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Journal ArticleJournal of High Energy Physics · August 1, 2025
Measurements of the total and differential Higgs boson production cross-sections, via WH and ZH associated production using H → WW* → ℓνℓν and H → WW* → ℓνjj decays, are presented. The analysis uses proton-proton events delivered by t ...
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Journal ArticleEuropean Physical Journal C · August 1, 2025
A search for a pseudoscalar a produced in association with a top-quark pair, or in association with a single top quark plus a W boson, with the pseudoscalar decaying into b-quarks (a→bb¯), is performed using the full Run 2 data sample using a dileptonic de ...
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Journal ArticleJournal of High Energy Physics · August 1, 2025
Measurements of W+W− → e±νμ∓ν production cross-sections are presented, providing a test of the predictions of perturbative quantum chromodynamics and the electroweak theory. The measurements are based on data fro ...
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Journal ArticleJournal of High Energy Physics · August 1, 2025
This paper presents searches for the direct pair production of charged light-flavour sleptons, each decaying into a stable neutralino and an associated Standard Model lepton. The analyses focus on the challenging “corridor” region, where the mass differenc ...
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Journal ArticleEuropean Physical Journal C · August 1, 2025
In this article, the following collaboration members were missing: John Apostolakis at CERN, Geneva, Switzerland Imran Latif at Physics Department, Brookhaven National Laboratory, Upton NY, USA Christian Lepore at Physics Department, Brookhaven National La ...
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Journal ArticlePhysical Review D · July 25, 2025
A search is presented for hadronic signatures of beyond the Standard Model (BSM) physics, with an emphasis on signatures of a strongly coupled hidden dark sector accessed via resonant production of a
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Journal ArticlePhysical Review D · July 17, 2025
A search for leptons displaced from the primary vertex is performed with the ATLAS detector at the Large Hadron Collider. The search includes the full proton-proton collision dataset collected during Run 2 at √s = 13 TeV and a partial dataset collected dur ...
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Journal ArticlePhysical Review D · July 8, 2025
A search for cascade decays of charged sleptons and sneutrinos using final states characterized by three leptons (electrons or muons) and missing transverse momentum is presented. The analysis is based on a dataset with
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 1, 2025
A search for the production of three massive vector bosons, VVZ(V=W,Z), in proton–proton collisions at s=13 TeV is performed using data with an integrated luminosity of 140 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. Events ...
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Journal ArticleEuropean Physical Journal C · July 1, 2025
High precision single-differential W±-boson production cross-sections as a function of electron or muon transverse momentum pT or their pseudorapity η, as well as double-differential cross-sections as functions of these variables, are measured in proton–pr ...
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Journal ArticleEuropean Physical Journal C · July 1, 2025
A measurement of the B0 meson lifetime using B0→J/ψK∗0 decays in data from 13 TeV proton–proton collisions with an integrated luminosity of 140fb-1 recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is (Formula presente ...
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Journal ArticleEuropean Physical Journal C · July 1, 2025
A set of measurements for the production of a W-boson in association with high-transverse-momentum jets is presented using 140 fb-1 of proton–proton collision data at a centre-of-mass energy of s=13 TeV collected by the ATLAS detector at the LHC. The measu ...
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Journal ArticleJournal of High Energy Physics · July 1, 2025
This paper presents a first measurement of the cross-section for the charged-current Drell-Yan process pp → W± → ℓ±ν above the resonance region, where ℓ is an electron or muon. The measurement is performed for transverse masses, mTW, ...
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Journal ArticleEuropean Physical Journal C · July 1, 2025
Jets with different radius parameters R are an important tool for probing quantum chromodynamics processes at different angular scales. Jets with small R=0.2 are instrumental in measurements of the substructure of large-R jets resulting from collimated had ...
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Journal ArticleJournal of High Energy Physics · July 1, 2025
The production of D± and Ds± charmed mesons is measured using the D±/Ds±→ ϕ(μμ)π± decay channel with 137 fb−1 of s = 13 TeV proton-proton collision data collected with the ATLAS detector at the Large Hadron Colli ...
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Journal ArticleJournal of High Energy Physics · July 1, 2025
This paper presents a search for massive, charged, long-lived particles with the ATLAS detector at the Large Hadron Collider using an integrated luminosity of 140 fb−1 of proton-proton collisions at s = 13 TeV. These particles are expected to mo ...
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Journal ArticleJournal of High Energy Physics · July 1, 2025
A search is performed for long-lived heavy neutral leptons (HNLs), produced through the decay of a W boson along with a muon or electron. Two channels are explored: a leptonic channel, in which the HNL decays into two leptons and a neutrino, and a semi-lep ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · June 1, 2025
A search is conducted for a new scalar boson S, with a mass distinct from that of the Higgs boson, decaying promptly into four leptons (ℓ=e, μ) via an intermediate state containing two on-shell, promptly decaying new spin-1 bosons Zd: S→Zd< ...
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Journal ArticleEuropean Physical Journal C · June 1, 2025
This paper presents a new τ-lepton reconstruction and identification procedure at the ATLAS detector at the Large Hadron Collider, which leads to significantly improved performance in the case of physics processes where a highly boosted pair of τ-leptons i ...
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Journal ArticleEuropean Physical Journal C · June 1, 2025
This paper presents the reconstruction of missing transverse momentum (pTmiss) in proton–proton collisions, at a center-of-mass energy of 13 TeV. This is a challenging task involving many detector inputs, combining fully calibrated electrons, muons, photon ...
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Journal ArticleEuropean Physical Journal C · May 1, 2025
This paper describes an algorithm for reconstructing and identifying a highly collimated hadronically decaying τ-lepton pair with low transverse momentum. When two τ-leptons are highly collimated, their visible decay products might overlap, degrading the r ...
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Journal ArticleEuropean Physical Journal C · May 1, 2025
A search is presented for a heavy scalar (H) or pseudo-scalar (A) predicted by the two-Higgs-doublet models, where the H/A is produced in association with a top-quark pair (tt¯H/A), and with the H/A decaying into a tt¯ pair. The full LHC Run 2 proton–proto ...
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Journal ArticleJournal of High Energy Physics · May 1, 2025
A search for pair production of vector-like leptons coupling to first- and second-generation Standard Model leptons is presented. The search is based on a dataset of proton-proton collisions at s = 13 TeV recorded with the ATLAS detector during Run 2 of th ...
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Journal ArticleJournal of High Energy Physics · May 1, 2025
A measurement of the ratio of the branching fractions, Rτ/e = B(W → τν)/B(W → eν), is performed using a sample of W bosons originating from top-quark decays to final states containing τ-leptons or electrons. This measurement uses pp collisions a ...
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Journal ArticleJournal of High Energy Physics · May 1, 2025
Correction to one figure and the corresponding numbers in the text are noted for the paper. A wrong cross-section was used for the theory prediction of t¯tA(→ t¯t), which was estimated to differ by around 1% with respect to the one of t¯tH(→ t¯t). It was f ...
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Journal ArticlePhysics Reports · April 22, 2025
This report reviews the published results of searches for possible additional scalar particles and exotic decays of the Higgs boson performed by the ATLAS Collaboration using up to 140 fb−1 of 13 TeV proton–proton collision data collected during ...
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Journal ArticlePhysical review letters · April 2025
Top-quark pair production is observed in lead-lead (Pb+Pb) collisions at sqrt[s_{NN}]=5.02 TeV at the Large Hadron Collider with the ATLAS detector. The data sample was recorded in 2015 and 2018, amounting to an integrated luminosity of 1.9 nb^{-1}. Even ...
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Journal ArticlePhysical Review C · April 1, 2025
This paper presents a measurement of jet-track correlations in photon-jet events, using 1.72 (Formula presented) of (Formula presented) data at (Formula presented) recorded with the ATLAS detector at the LHC. Events with energetic photon-jet pairs are sele ...
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Journal ArticlePhysical Review D · April 1, 2025
Charged Higgs bosons produced either in top-quark decays or in association with a top quark, subsequently decaying via (Formula presented), are searched for in (Formula presented) of proton-proton collision data at (Formula presented) recorded with the ATL ...
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Journal ArticleEuropean Physical Journal C · April 1, 2025
The Lund jet plane (LJP) is measured for the first time in tt¯ events, using 140 fb-1 of s=13 TeV pp collision data collected with the ATLAS detector at the LHC. The LJP is a two-dimensional observable of the sub-structure of hadronic jets that acts as a p ...
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Journal ArticleEuropean Physical Journal C · March 1, 2025
A search for a dark photon, a new light neutral particle, which decays promptly into collimated pairs of electrons or muons is presented. The search targets dark photons resulting from the exotic decay of the Standard Model Higgs boson, assuming its produc ...
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Journal ArticlePhysical review letters · March 2025
A search is performed for dark matter particles produced in association with a resonantly produced pair of b-quarks with 30
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Journal ArticlePhysical Review D · March 1, 2025
In ultrarelativistic heavy ion collisions at the LHC, each nucleus acts a sources of high-energy real photons that can scatter off the opposing nucleus in ultraperipheral photonuclear ((Formula presented)) collisions. Hard scattering processes initiated by ...
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Journal ArticleJournal of Instrumentation · March 1, 2025
In 2022 and 2023, the Large Hadron Collider produced approximately two billion hadronic interactions each second from bunches of protons that collide at a rate of 40 MHz. The ATLAS trigger system is used to reduce this rate to a few kHz for recording. Sele ...
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Journal ArticleEuropean Physical Journal C · March 1, 2025
The ATLAS experiment has developed extensive software and distributed computing systems for Run 3 of the LHC. These systems are described in detail, including software infrastructure and workflows, distributed data and workload management, database infrast ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · February 1, 2025
This Letter presents a constraint on the total width of the Higgs boson (ΓH) using a combined measurement of on-shell Higgs boson production and the production of four top quarks, which involves contributions from off-shell Higgs boson-mediated ...
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Journal ArticlePhysical review letters · February 2025
This Letter presents a search for highly ionizing magnetic monopoles in 262 μb^{-1} of ultraperipheral Pb+Pb collision data at sqrt[s_{NN}]=5.36 TeV collected by the ATLAS detector at the LHC. A new methodology that exploits the properties of clusters of ...
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Journal ArticleEuropean Physical Journal C · February 1, 2025
This paper reports the measurement of Higgs boson production in association with a tt¯ pair in the H→bb¯ decay channel. The analysis uses 140 fb-1 of 13 TeV proton–proton collision data collected with the ATLAS detector at the Large Hadron Collider. The fi ...
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Journal ArticlePhysical Review D · February 1, 2025
A search for the production of three Higgs bosons ((Formula presented)) in the (Formula presented) final state is presented. The search uses (Formula presented) of proton-proton collision data at (Formula presented) collected with the ATLAS detector at the ...
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Journal ArticleEuropean Physical Journal C · February 1, 2025
A search for a light charged Higgs boson produced in decays of the top quark, t→H±b with H±→cs, is presented. This search targets the production of top-quark pairs tt¯→WbH±b, with W→ℓν (ℓ=e,μ), resulting in a lepton-plus-jets final state characterised by a ...
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Journal ArticleJournal of Instrumentation · February 1, 2025
The high-luminosity phase of LHC operations (HL-LHC), will feature a large increase in simultaneous proton-proton interactions per bunch crossing up to 200, compared with a typical leveling target of 64 in Run 3. Such an increase will create a very challen ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 2025
A combination of searches for singly and doubly charged Higgs bosons, H± and H±±, produced via vector-boson fusion is performed using 140 fb−1 of proton–proton collisions at a centre-of-mass energy of 13 TeV, collected with ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 2025
Inclusive cross-sections for top-quark pair production in association with charm quarks are measured with proton–proton collision data at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 140 fb−1, collected with the ...
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Journal ArticlePhysical Review D · January 1, 2025
A combination of searches for the single production of vectorlike top quarks ((Formula presented)) is presented. These analyses are based on proton-proton collisions at (Formula presented) recorded in 2015-2018 with the ATLAS detector at the Large Hadron C ...
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Journal ArticleComputing and Software for Big Science · December 1, 2024
Charged particle reconstruction in the presence of many simultaneous proton–proton (pp) collisions in the LHC is a challenging task for the ATLAS experiment’s reconstruction software due to the combinatorial complexity. This paper describes the major chang ...
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Journal ArticleComputing and Software for Big Science · December 1, 2024
The need for large-scale production of highly accurate simulated event samples for the extensive physics programme of the ATLAS experiment at the Large Hadron Collider motivates the development of new simulation techniques. Building on the recent success o ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · December 1, 2024
This Letter presents a differential cross-section measurement of Lund subjet multiplicities, suitable for testing current and future parton shower Monte Carlo algorithms. This measurement is made in dijet events in 140 fb−1 of s=13 TeV proton–pr ...
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Journal ArticlePhysical review letters · December 2024
High-energy nuclear collisions create a quark-gluon plasma, whose initial condition and subsequent expansion vary from event to event, impacting the distribution of the eventwise average transverse momentum [P([p_{T}])]. Disentangling the contributions fro ...
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Journal ArticlePhysical Review D · December 1, 2024
A search for heavy right-handed Majorana neutrinos is performed with the ATLAS detector at the CERN Large Hadron Collider, using the (Formula Presented) of proton-proton collision data at (Formula Presented) collected during Run 2. This search targets (For ...
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Journal ArticlePhysical review letters · December 2024
Z boson events at the Large Hadron Collider can be selected with high purity and are sensitive to a diverse range of QCD phenomena. As a result, these events are often used to probe the nature of the strong force, improve Monte Carlo event generators, and ...
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Journal ArticleEuropean Physical Journal C · December 1, 2024
Properties of the underlying-event in pp interactions are investigated primarily via the strange hadrons KS0, Λ and Λ¯, as reconstructed using the ATLAS detector at the LHC in minimum-bias pp collision data at s=13 TeV. The hadrons are reconstructed via th ...
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Journal ArticleEuropean Physical Journal C · December 1, 2024
The ATLAS tile calorimeter (TileCal) is the hadronic sampling calorimeter covering the central region of the ATLAS detector at the Large Hadron Collider (LHC). This paper gives an overview of the calorimeter’s operation and performance during the years 201 ...
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Journal ArticleEuropean Physical Journal C · December 1, 2024
Proton–proton collision data recorded by the ATLAS detector in 2011, at a centre-of-mass energy of 7 TeV, have been used for an improved determination of the W-boson mass and a first measurement of the W-boson width at the LHC. Recent fits to the proton pa ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 1, 2024
A search for Higgs boson pair production via vector-boson fusion is performed in the Lorentz-boosted regime, where a Higgs boson candidate is reconstructed as a single large-radius jet, using 140 fb−1 of proton–proton collision data at s=13 TeV ...
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Journal ArticlePhysical Review D · November 1, 2024
A search is presented for direct pair production of the stop, the supersymmetric partner of the top quark, in a decay through an Formula Presented-parity violating coupling to a charged lepton and a Formula Presented-quark. The dataset corresponds to an in ...
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Journal ArticlePhysical Review C · November 1, 2024
This paper describes a measurement of the jet radius dependence of the dijet momentum balance between leading back-to-back jets in Formula Presented of Formula Presented collisions collected in 2018 and Formula Presented of Formula Presented collisions col ...
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Journal ArticleScience Bulletin · October 15, 2024
Results from a wide range of searches targeting different experimental signatures with and without missing transverse momentum (ETmiss) are used to constrain a Two-Higgs-Doublet Model (2HDM) with an additional pseudo-scalar mediating ...
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Journal ArticleEuropean Physical Journal C · October 1, 2024
The ratio of branching ratios of the W boson to muons and electrons, RWμ/e=B(W→μν)/B(W→eν), has been measured using 140fb-1 of pp collision data at s=13 TeV collected with the ATLAS detector at the LHC, probing the universa ...
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Journal ArticlePhysical review letters · October 2024
The associated production of Higgs and W bosons via vector-boson fusion is highly sensitive to the relative sign of the Higgs boson couplings to W and Z bosons. In this Letter, two searches for this process are presented, using 140 fb^{-1} of proton-proto ...
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Journal ArticleJournal of Instrumentation · October 1, 2024
Pixel sensors in 3D technology equip the outer ends of the staves of the Insertable B Layer (IBL), the innermost layer of the ATLAS Pixel Detector, which was installed before the start of LHC Run 2 in 2015. 3D pixel sensors are expected to exhibit more tol ...
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Journal ArticlePhysical review letters · October 2024
A search for the exclusive hadronic decays W^{±}→π^{±}γ, W^{±}→K^{±}γ, and W^{±}→ρ^{±}γ is performed using up to 140 fb^{-1} of proton-proton collisions recorded with the ATLAS detector at a center-of-mass energy of sqrt[s]=13 TeV. If observed, these rar ...
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Journal ArticlePhysical review letters · October 2024
A search for long-lived particles (LLPs) using 140 fb^{-1} of pp collision data with sqrt[s]=13 TeV recorded by the ATLAS experiment at the LHC is presented. The search targets LLPs with masses between 5 and 55 GeV that decay hadronically in the ATLAS in ...
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Journal ArticleEuropean Physical Journal C · October 1, 2024
This paper reports a summary of searches for a fermionic dark matter candidate in the context of theoretical models characterised by a mediator particle exchange in the s-channel. The data sample considered consists of pp collisions delivered by the Large ...
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Journal ArticleEuropean Physical Journal C · October 1, 2024
The observation of the electroweak production of a W boson and a photon in association with two jets, using pp collision data at the Large Hadron Collider at a centre of mass energy of s=13 TeV, is reported. The data were recorded by the ATLAS experiment f ...
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Journal ArticleEuropean Physical Journal C · October 1, 2024
This paper describes measurements of the transverse momentum spectra of W and Z bosons produced in proton–proton collisions at centre-of-mass energies of s=5.02 TeV and s=13 TeV with the ATLAS experiment at the Large Hadron Collider. Measurements are perfo ...
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Journal ArticlePhysical Review D · October 1, 2024
The inclusive cross section for the production of a single top quark in association with a Formula Presented boson is measured using Formula Presented of proton-proton collision data collected with the ATLAS detector at Formula Presented. Events containing ...
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Journal ArticlePhysical Review D · October 1, 2024
Measurements of jet cross-section ratios between inclusive bins of jet multiplicity are performed in Formula Presented of proton-proton collisions with Formula Presented center-of-mass energy, recorded with the ATLAS detector at CERN’s Large Hadron Collide ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 1, 2024
A search for heavy Majorana neutrinos in scattering of same-sign W boson pairs in proton–proton collisions at s=13 TeV at the LHC is reported. The dataset used corresponds to an integrated luminosity of 140 fb−1, collected with the ATLAS detecto ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 1, 2024
A search is presented for the pair production of higgsinos χ˜ in gauge-mediated supersymmetry models, where the lightest neutralinos χ˜10 decay into a light gravitino G˜ in association with either a Higgs h or a Z boson. The search i ...
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Journal ArticlePhysical review letters · September 2024
This Letter presents results from a combination of searches for Higgs boson pair production using 126-140 fb^{-1} of proton-proton collision data at sqrt[s]=13 TeV recorded with the ATLAS detector. At 95% confidence level (CL), the upper limit on the pro ...
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Journal ArticlePhysical review letters · September 2024
This Letter presents the first study of the energy dependence of diboson polarization fractions in WZ→ℓνℓ^{'}ℓ^{'}(ℓ,ℓ^{'}=e,μ) production. The dataset used corresponds to an integrated luminosity of 140 fb^{-1} of proton-proton collisions at a center-of- ...
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Journal ArticleEuropean Physical Journal C · September 1, 2024
This paper presents a measurement of the production cross-section of a Z boson in association with b- or c-jets, in proton–proton collisions at s=13 TeV with the ATLAS experiment at the Large Hadron Collider using data corresponding to an integrated lumino ...
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Journal ArticlePhysical Review D · September 1, 2024
A search is presented for the pair production of heavy vectorlike quarks (VLQs) that each decay into a W boson and a light quark. This study focuses on events where one W boson decays into leptons and the other into hadrons. The search analyzed 140 fb ...
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Journal ArticlePhysical Review D · September 1, 2024
This paper presents a search for exotic decays of the Higgs boson into a pair of new pseudoscalar particles, Formula Presented, where one pseudoscalar decays into a Formula Presented-quark pair and the other decays into a Formula Presented-lepton pair, in ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 1, 2024
Searches for exclusive decays of the Higgs boson into D⁎γ and of the Z boson into D0γ and Ks0γ can probe flavour-violating Higgs boson and Z boson couplings to light quarks. Searches for these decays are perform ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 1, 2024
This paper reports cross-section measurements of ZZ production in pp collisions at s=13.6TeV at the Large Hadron Collider. The data were collected by the ATLAS detector in 2022, and correspond to an integrated luminosity of 29 fb−1. Events in th ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 1, 2024
A measurement of the Standard Model Higgs boson produced in association with a W or Z boson and decaying into a pair of τ-leptons is presented. This search is based on proton-proton collision data collected at s=13 TeV by the ATLAS experiment at the LHC co ...
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Journal ArticlePhysical Review D · August 1, 2024
A search for the nonresonant production of Higgs boson pairs in the Formula Presented channel is performed using Formula Presented of proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Coll ...
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Journal ArticlePhysical Review D · August 1, 2024
A search is performed for localized excesses in the low-mass dijet invariant mass distribution, targeting a hypothetical new particle decaying into two jets and produced in association with either a high transverse momentum photon or a jet. The search uses ...
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Journal ArticleEuropean Physical Journal C · August 1, 2024
A search for leptoquark pair production decaying into te-t¯e+ or tμ-t¯μ+ in final states with multiple leptons is presented. The search is based on a dataset of pp collisions at s=13TeV recorded with the ATLAS de ...
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Journal ArticleJournal of Instrumentation · August 1, 2024
The identification of top quark decays where the top quark has a large momentum transverse to the beam axis, known as top tagging, is a crucial component in many measurements of Standard Model processes and searches for beyond the Standard Model physics at ...
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Journal ArticlePhysical Review D · August 1, 2024
Several processes studied by the ATLAS experiment at the Large Hadron Collider produce low-momentum Formula Presented-flavored hadrons in the final state. This paper describes the calibration of a dedicated tagging algorithm that identifies Formula Present ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 1, 2024
A measurement of the invisible width of the Z boson using events with jets and missing transverse momentum is presented using 37 fb−1 of 13 TeV proton–proton data collected by the ATLAS detector in 2015 and 2016. The ratio of Z→inv to Z→ℓℓ event ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 1, 2024
A statistical combination of various searches for pair-produced leptoquarks is presented, using the full LHC Run 2 (2015–2018) data set of 139 fb−1 collected with the ATLAS detector from proton–proton collisions at a centre-of-mass energy of s=1 ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 1, 2024
A search is presented for the pair-production of heavy vector-like quarks in the lepton+jets final state using 140 fb−1 of proton–proton collisions at s=13 TeV collected with the ATLAS detector. The search is optimised for vector-like top-quarks ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 1, 2024
Fiducial and total W± and Z boson cross sections, their ratios and the ratio of top-antitop-quark pair and W-boson fiducial cross sections are measured in proton–proton collisions at a centre-of-mass energy of s=13.6 TeV, corresponding to an int ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 1, 2024
The observation of the electroweak production of single-top-quarks is made using 255 pb−1 of proton-proton collision data recorded at s=5.02 TeV with the ATLAS detector at the Large Hadron Collider. An event selection is used to identify single- ...
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Journal ArticleEuropean Physical Journal C · July 1, 2024
Presented is the search for anomalous Higgs boson decays into two axion-like particles (ALPs) using the full Run 2 data set of 140fb-1 of proton-proton collisions at a centre-of-mass energy of 13TeV recorded by the ATLAS experiment. The ALPs are ...
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Journal ArticlePhysical review letters · July 2024
Statistical combinations of searches for charginos and neutralinos using various decay channels are performed using 139 fb^{-1} of pp collision data at sqrt[s]=13 TeV with the ATLAS detector at the Large Hadron Collider. Searches targeting pure-wino char ...
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Journal ArticleEuropean Physical Journal C · July 1, 2024
A search is presented for flavour-changing neutral-current interactions involving the top quark, the Higgs boson and an up-type quark (q=u,c) with the ATLAS detector at the Large Hadron Collider. The analysis considers leptonic decays of the top quark alon ...
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Journal ArticlePhysical Review D · July 1, 2024
A search for charged-lepton-flavor violating Formula Presented (Formula Presented, Formula Presented) interactions is presented, considering both top-quark production and decay. The data analyzed correspond to Formula Presented of proton-proton collisions ...
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Journal ArticleEuropean Physical Journal C · July 1, 2024
A search is reported for long-lived dark photons with masses between 0.1 GeV and 15 GeV, from exotic decays of Higgs bosons produced via vector-boson-fusion. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter ...
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Journal ArticlePhysical review letters · June 2024
A combination of searches for a new resonance decaying into a Higgs boson pair is presented, using up to 139 fb^{-1} of pp collision data at sqrt[s]=13 TeV recorded with the ATLAS detector at the LHC. The combination includes searches performed in three ...
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Journal ArticlePhysical Review D · June 1, 2024
A search for high-mass resonances decaying into a Formula Presented-lepton and a neutrino using proton-proton collisions at a center-of-mass energy of Formula Presented is presented. The full run 2 data sample corresponding to an integrated luminosity of F ...
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Journal ArticlePhysical Review D · June 1, 2024
This paper presents a search for pair production of higgsinos, the supersymmetric partners of the Higgs bosons, in scenarios with gauge-mediated supersymmetry breaking. Each higgsino is assumed to decay into a Higgs boson and a nearly massless gravitino. T ...
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Journal ArticlePhysical Review D · June 1, 2024
A search for the single production of a vectorlike top partner (Formula Presented) with mass greater than 1 TeV decaying into a Formula Presented boson and a top quark is presented, using the full Run 2 dataset corresponding to Formula Presented of Formula ...
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Journal ArticleJournal of Instrumentation · June 1, 2024
Inelastic beam-gas collisions at the Large Hadron Collider (LHC), within a few hundred metres of the ATLAS experiment, are known to give the dominant contribution to beam backgrounds. These are monitored by ATLAS with a dedicated Beam Conditions Monitor (B ...
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Journal ArticlePhysical review letters · June 2024
A combination of fifteen top quark mass measurements performed by the ATLAS and CMS experiments at the LHC is presented. The datasets used correspond to an integrated luminosity of up to 5 and 20 fb^{-1} of proton-proton collisions at center-of-mass energ ...
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Journal ArticlePhysical Review D · June 1, 2024
Measurements of the substructure of top-quark jets are presented, using Formula Presented of 13 TeV Formula Presented collision data recorded with the ATLAS detector at the LHC. Top-quark jets reconstructed with the anti-Formula Presented algorithm with a ...
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Journal ArticleJournal of Instrumentation · June 1, 2024
The ATLAS trigger system is a crucial component of the ATLAS experiment at the LHC. It is responsible for selecting events in line with the ATLAS physics programme. This paper presents an overview of the changes to the trigger and data acquisition system d ...
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Journal ArticlePhysical review letters · May 2024
Angular correlations between heavy quarks provide a unique probe of the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. Results are presented of a measurement of the azimuthal angle correlations between muons originating from semilept ...
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Journal ArticlePhysical review letters · May 2024
Higgsinos with masses near the electroweak scale can solve the hierarchy problem and provide a dark matter candidate, while detecting them at the LHC remains challenging if their mass splitting is O(1 GeV). This Letter presents a novel search for nearly m ...
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Journal ArticleJournal of Instrumentation · May 1, 2024
The ATLAS detector is installed in its experimental cavern at Point 1 of the CERN Large Hadron Collider. During Run 2 of the LHC, a luminosity of ℒ = 2 × 1034 cm-2 s-1 was routinely achieved at the start of fills, twice the ...
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Journal ArticleJournal of Instrumentation · May 1, 2024
We present performance studies of the Time-of-Flight (ToF) subdetector of the ATLAS Forward Proton (AFP) detector at the LHC. Efficiencies and resolutions are measured using high-statistics data samples collected at low and moderate pile-up in 2017, the fi ...
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Journal ArticleEuropean Physical Journal C · May 1, 2024
Clusters of topologically connected calorimeter cells around cells with large absolute signal-to-noise ratio (topo-clusters) are the basis for calorimeter signal reconstruction in the ATLAS experiment. Topological cell clustering has proven performant in L ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · March 1, 2024
A search for the decay of the Higgs boson to a Z boson and a light, pseudoscalar particle, a, decaying respectively to two leptons and to two photons is reported. The search uses the full LHC Run 2 proton–proton collision data at s=13 TeV, corresponding to ...
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Journal ArticlePhysical review letters · March 2024
ATLAS measured the centrality dependence of the dijet yield using 165 nb^{-1} of p+Pb data collected at sqrt[s_{NN}]=8.16 TeV in 2016. The event centrality, which reflects the p+Pb impact parameter, is characterized by the total transverse energy registe ...
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Journal ArticlePhysical review letters · March 2024
This Letter presents the first study of Higgs boson production in association with a vector boson (V=W or Z) in the fully hadronic qqbb final state using data recorded by the ATLAS detector at the LHC in proton-proton collisions at sqrt[s]=13 TeV and corr ...
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Journal ArticleEuropean Physical Journal C · March 1, 2024
This paper presents for the first time a precise measurement of the production properties of the Z boson in the full phase space of the decay leptons. This is in contrast to the many previous precise unfolded measurements performed in the fiducial phase sp ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · February 1, 2024
The CP properties of the coupling between the Higgs boson and the top quark are investigated using 139 fb−1 of proton–proton collision data recorded by the ATLAS experiment at the LHC at a centre-of-mass energy of s=13 TeV. The CP structure of t ...
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Journal ArticlePhysical review letters · February 2024
Searches for new resonances are performed using an unsupervised anomaly-detection technique. Events with at least one electron or muon are selected from 140 fb^{-1} of pp collisions at sqrt[s]=13 TeV recorded by ATLAS at the Large Hadron Collider. The ap ...
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Journal ArticleEuropean Physical Journal C · February 1, 2024
Measurements of the differential production cross-sections of prompt and non-prompt J/ψ and ψ(2S) mesons with transverse momenta between 8 and 360 GeV and rapidity in the range |y|<2 are reported. Furthermore, measurements of the non-prompt fractions of J/ ...
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Journal ArticlePhysical Review D · February 1, 2024
A search for quantum black holes in electron + jet and muon + jet invariant mass spectra is performed with 140 fb-1 of data collected by the ATLAS detector in proton-proton collisions at √s = 13 TeV at the Large Hadron Collider. The observed invariant mass ...
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Journal ArticleEuropean Physical Journal C · February 1, 2024
This paper presents a study of Z→llγ decays with the ATLAS detector at the Large Hadron Collider. The analysis uses a proton–proton data sample corresponding to an integrated luminosity of 20.2 fb-1 collected at a centre-of-mass energy s = 8 TeV ...
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Journal ArticleEuropean Physical Journal C · February 1, 2024
A search for the associated production of a heavy resonance with a top-quark or a top-antitop-quark pair, and decaying into a tt¯ pair is presented. The search uses the data recorded by the ATLAS detector in pp collisions at s=13 TeV at the Large Hadron Co ...
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Journal ArticleEuropean Physical Journal C · February 1, 2024
Corrections to two figures, one table and the corresponding numbers in the text are noted for the paper. Systematic uncertainties arising from the comparison of the nominal tt¯tt¯ simulation with alternative samples generated with Sherpa and with MadGraph5 ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 2024
The inclusive top-quark-pair production cross section σtt¯ and its ratio to the Z-boson production cross section have been measured in proton–proton collisions at s=13.6 TeV, using 29 fb−1 of data collected in 2022 with the ATLAS expe ...
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Journal ArticlePhysical review letters · January 2024
The first evidence for the Higgs boson decay to a Z boson and a photon is presented, with a statistical significance of 3.4 standard deviations. The result is derived from a combined analysis of the searches performed by the ATLAS and CMS Collaborations wi ...
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Journal ArticlePhysical review letters · January 2024
This Letter reports the observation of WZγ production and a measurement of its cross section using 140.1±1.2 fb^{-1} of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The WZγ ...
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Journal ArticleEuropean Physical Journal C · January 1, 2024
The inclusive Higgs boson production cross-section is measured in the di-photon and the ZZ∗→ 4 ℓ decay channels using 31.4 and 29.0 fb - 1 of pp collision data respectively, collected with the ATLAS detector at a centre-of-mass energy ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 2024
Semi-visible jets, with a significant contribution to the event's missing transverse momentum, can arise in strongly interacting dark sectors. This results in an event topology where one of the jets can be aligned with the direction of the missing transver ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 2024
This letter reports the observation of W(ℓν)γγ production in proton-proton collisions. This measurement uses the full Run 2 sample of events recorded at a center-of-mass energy of s=13 TeV by the ATLAS detector at the LHC, corresponding to an integrated lu ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 2024
This letter presents a search for narrow, high-mass resonances in the Zγ final state with the Z boson decaying into a pair of electrons or muons. The s=13 TeV pp collision data were recorded by the ATLAS detector at the CERN Large Hadron Collider and have ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · December 10, 2023
The mass of the Higgs boson is measured in the H→γγ decay channel, exploiting the high resolution of the invariant mass of photon pairs reconstructed from the decays of Higgs bosons produced in proton–proton collisions at a centre-of-mass energy s=13 TeV. ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · December 10, 2023
Searches for the exclusive decays of the Higgs boson to an ω meson and a photon or a K⁎ meson and a photon can probe flavour-conserving and flavour-violating Higgs boson couplings to light quarks, respectively. Searches for these decays, along w ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · December 10, 2023
A search for heavy long-lived multi-charged particles is performed using the ATLAS detector at the LHC. Data collected in 2015–2018 at s=13 TeV from pp collisions corresponding to an integrated luminosity of 139 fb−1 are examined. Particles prod ...
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Journal ArticlePhysical review letters · December 2023
A search for events with a dark photon produced in association with a dark Higgs boson via rare decays of the standard model Z boson is presented, using 139 fb^{-1} of sqrt[s]=13 TeV proton-proton collision data recorded by the ATLAS detector at the Larg ...
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Journal ArticlePhysical review letters · December 2023
A measurement of the mass of the Higgs boson combining the H→ZZ^{*}→4ℓ and H→γγ decay channels is presented. The result is based on 140 fb^{-1} of proton-proton collision data collected by the ATLAS detector during LHC run 2 at a center-of-mass energy of ...
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Journal ArticleEuropean Physical Journal C · December 1, 2023
A search for heavy right-handed Majorana or Dirac neutrinos NR and heavy right-handed gauge bosons WR is performed in events with energetic electrons or muons, with the same or opposite electric charge, and energetic jets. The search ...
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Journal ArticlePhysical Review D · December 1, 2023
New particles with large masses that decay into hadronically interacting particles are predicted by many models of physics beyond the Standard Model. A search for a massive resonance that decays into pairs of dijet resonances is performed using Formula Pre ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 10, 2023
Parton energy loss in the quark–gluon plasma (QGP) is studied with a measurement of photon-tagged jet production in 1.7 nb−1 of Pb+Pb data and 260 pb−1 of pp data, both at sNN=5.02 TeV, with the ATLAS detector. The process ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 10, 2023
A search for new phenomena giving rise to pairs of opposite electrically charged muons with impact parameters in the millimeter range is presented, using 139 fb−1 of s=13 TeV pp collision data from the ATLAS detector at the LHC. The search targe ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 10, 2023
This Letter reports on a search for off-shell production of the Higgs boson using 139 fb−1 of pp collision data at s= 13 TeV collected by the ATLAS detector at the Large Hadron Collider. The signature is a pair of Z bosons, with contributions fr ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 10, 2023
This Letter presents the measurement of the fiducial and differential cross-sections of the electroweak production of a Zγ pair in association with two jets. The analysis uses 140 fb−1 of LHC proton–proton collision data taken at s=13 TeV record ...
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Journal ArticlePhysical review letters · November 2023
This Letter reports the observation of single top quarks produced together with a photon, which directly probes the electroweak coupling of the top quark. The analysis uses 139 fb^{-1} of 13 TeV proton-proton collision data collected with the ATLAS detect ...
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Journal ArticleJournal of Instrumentation · November 1, 2023
The ATLAS experiment relies on real-time hadronic jet reconstruction and b-tagging to record fully hadronic events containing b-jets. These algorithms require track reconstruction, which is computationally expensive and could overwhelm the high-level-trigg ...
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Journal ArticlePhysical Review D · November 1, 2023
A search for a new pseudoscalar Formula Presented-boson produced in events with a top-quark pair, where the Formula Presented-boson decays into a pair of muons, is performed using Formula Presented Formula Presented collision data collected with the ATLAS ...
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Journal ArticleJournal of Instrumentation · November 1, 2023
Measurements and searches performed with the ATLAS detector at the CERN LHC often involve signatures with one or more prompt leptons. Such analyses are subject to 'fake/non-prompt' lepton backgrounds, where either a hadron or a lepton from a hadron decay o ...
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Journal ArticleEuropean Physical Journal C · November 1, 2023
A search for pair-produced scalar or vector leptoquarks decaying into a b-quark and a τ -lepton is presented using the full LHC Run 2 (2015–2018) data sample of 139 fb - 1 collected with the ATLAS detector in proton–proton collisions at a centre ...
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Journal ArticleEuropean Physical Journal C · November 1, 2023
Searches for long-lived particles (LLPs) are among the most promising avenues for discovering physics beyond the Standard Model at the Large Hadron Collider (LHC). However, displaced signatures are notoriously difficult to identify due to their ability to ...
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Journal ArticlePhysical review letters · October 2023
A search is made for potential ccc[over ¯]c[over ¯] tetraquarks decaying into a pair of charmonium states in the four muon final state using proton-proton collision data at sqrt[s]=13 TeV, corresponding to an integrated luminosity of 140 fb^{-1} recorded ...
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Journal ArticlePhysical review letters · October 2023
This Letter reports the observation of τ-lepton-pair production in ultraperipheral lead-lead collisions Pb+Pb→Pb(γγ→ττ)Pb and constraints on the τ-lepton anomalous magnetic moment a_{τ}. The dataset corresponds to an integrated luminosity of 1.44 nb^{-1} ...
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Journal ArticlePhysical review letters · October 2023
A key open question in the study of multiparticle production in high-energy pp collisions is the relationship between the "ridge"-i.e., the observed azimuthal correlations between particles in the underlying event that extend over all rapidities-and hard o ...
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Journal ArticleEuropean Physical Journal C · October 1, 2023
The luminosity determination for the ATLAS detector at the LHC during Run 2 is presented, with pp collisions at a centre-of-mass energy s=13 TeV. The absolute luminosity scale is determined using van der Meer beam separation scans during dedicated running ...
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Journal ArticlePhysical review letters · October 2023
This letter presents a measurement of the nuclear modification factor of large-radius jets in sqrt[s_{NN}]=5.02 TeV Pb+Pb collisions by the ATLAS experiment. The measurement is performed using 1.72 nb^{-1} and 257 pb^{-1} of Pb+Pb and pp data, respectiv ...
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Journal ArticlePhysical Review D · October 1, 2023
The vector-boson production cross section for the Higgs boson decay in the Formula Presented channel is measured as a function of kinematic observables sensitive to the Higgs boson production and decay properties as well as integrated in a fiducial phase s ...
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Journal ArticleEuropean Physical Journal C · September 1, 2023
Searches for the exclusive decays of Higgs and Z bosons into a vector quarkonium state and a photon are performed in the μ+μ-γ final state with a proton–proton collision data sample corresponding to an integrated luminosity of 139 fb - 1 collect ...
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Journal ArticleEuropean Physical Journal C · September 1, 2023
A search for Majorana neutrinos in same-sign WW scattering events is presented. The analysis uses s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb - 1 recorded during 2015–2018 by the ATLAS detector at the Large Hadr ...
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Journal ArticlePhysical Review D · September 1, 2023
A search is presented for a heavy resonance Formula Presented decaying into a Standard Model Higgs boson Formula Presented and a new particle Formula Presented in a fully hadronic final state. The full Large Hadron Collider run 2 dataset of proton-proton c ...
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Journal ArticlePhysical Review D · September 1, 2023
A search for nonresonant Higgs boson pair production in the Formula Presented final state is presented. The analysis uses Formula Presented of Formula Presented collision data at Formula Presented collected with the ATLAS detector at the Large Hadron Colli ...
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Journal ArticleEuropean Physical Journal C · September 1, 2023
Higgs boson production via gluon–gluon fusion is measured in the WW*? e?µ? decay channel. The dataset utilized corresponds to an integrated luminosity of 139 fb - 1 collected by the ATLAS detector from s=13 TeV proton–proton collision ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2023
Measurements of joint-polarisation states of W and Z gauge bosons in W±Z production are presented. The data set used corresponds to an integrated luminosity of 139 fb−1 of proton–proton collisions at a centre-of-mass energy of 13 TeV ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2023
A measurement of the polarisation of W bosons produced in top-quark decays is presented, using proton–proton collision data at a centre-of-mass energy of s=13 TeV. The data were collected by the ATLAS detector at the Large Hadron Collider and correspond to ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2023
A measurement of the charge asymmetry in top-quark pair (tt¯) production in association with a photon is presented. The measurement is performed in the single-lepton tt¯ decay channel using proton–proton collision data collected with the ATLAS detector at ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2023
The mass of the Higgs boson is measured in the H→ZZ⁎→4ℓ decay channel. The analysis uses proton–proton collision data from the Large Hadron Collider at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector between 2015 and 2018, corre ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2023
Constraints on the Higgs boson self-coupling are set by combining double-Higgs boson analyses in the bb¯bb¯, bb¯τ+τ− and bb¯γγ decay channels with single-Higgs boson analyses targeting the γγ, ZZ⁎, WW⁎, τ+
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2023
A search for the pair-production of vector-like quarks optimized for decays into a Z boson and a third-generation Standard Model quark is presented, using the full Run 2 dataset corresponding to 139fb−1 of pp collisions at s=13TeV, collected in ...
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Journal ArticlePhysical review letters · August 2023
A test of CP invariance in Higgs boson production via vector-boson fusion has been performed in the H→γγ channel using 139 fb^{-1} of proton-proton collision data at sqrt[s]=13 TeV collected by the ATLAS detector at the LHC. The optimal observable method ...
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Journal ArticlePhysical review letters · August 2023
A search for a long-lived, heavy neutral lepton (N) in 139 fb^{-1} of sqrt[s]=13 TeV pp collision data collected by the ATLAS detector at the Large Hadron Collider is reported. The N is produced via W→Nμ or W→Ne and decays into two charged leptons and a ...
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Journal ArticleEuropean Physical Journal C · August 1, 2023
A search for pair-produced vector-like quarks using events with exactly one lepton (e or μ), at least four jets including at least one b-tagged jet, and large missing transverse momentum is presented. Data from proton–proton collisions at a centre-of-mass ...
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Journal ArticleEuropean Physical Journal C · August 1, 2023
This paper presents a measurement of fiducial and differential cross-sections for W+W- production in proton–proton collisions at s=13 TeV with the ATLAS experiment at the Large Hadron Collider using a dataset corresponding to an integ ...
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Journal ArticleEuropean Physical Journal C · August 1, 2023
The identification of b-jets, referred to as b-tagging, is an important part of many physics analyses in the ATLAS experiment at the Large Hadron Collider and an accurate calibration of its performance is essential for high-quality physics results. This pu ...
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Journal ArticlePhysical review letters · August 2023
Jet quenching is the process of color-charged partons losing energy via interactions with quark-gluon plasma droplets created in heavy-ion collisions. The collective expansion of such droplets is well described by viscous hydrodynamics. Similar evidence of ...
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Journal ArticlePhysical Review D · August 1, 2023
A measurement of the top quark pair-production cross section in the lepton + jets decay channel is presented. It is based on 4.6 fb - 1 of s = 7 TeV p p collision data collected during 2011 by the ATLAS experiment at the CERN Large Hadron Collider. A three ...
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Journal ArticlePhysical Review C · August 1, 2023
Measurements of the suppression and correlations of dijets is performed using 3 µ b − 1 of Xe+Xe data at s N N = 5.44 TeV collected with the ATLAS detector at the CERN Large Hadron Collider. Dijets with jets reconstructed using the R = 0.4 anti- k t algori ...
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Journal ArticlePhysical Review D · August 1, 2023
Higgs boson production via gluon-gluon fusion and vector-boson fusion in proton-proton collisions is measured in the H → W W * → e ν μ ν decay channel. The Large Hadron Collider delivered proton-proton collisions at a center-of-mass energy of 13 TeV betwee ...
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Journal ArticlePhysical Review D · August 1, 2023
The production of a W boson in association with a single charm quark is studied using 140 fb - 1 of s = 13 TeV proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider. The charm quark is tagged by the presence of a charm ...
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Journal ArticlePhysical Review D · August 1, 2023
A search is performed for delayed and nonpointing photons originating from the displaced decay of a neutral long-lived particle (LLP). The analysis uses the full run 2 dataset of proton-proton collisions delivered by the LHC at a center-of-mass energy of F ...
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Journal ArticlePhysical Review D · August 1, 2023
A search for flavor-changing neutral-current couplings between a top quark, an up or charm quark, and a Formula Presented boson is presented, using proton-proton collision data at Formula Presented collected by the ATLAS detector at the Large Hadron Collid ...
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Journal ArticlePhysical Review D · August 1, 2023
A search for the charged-lepton-flavor-violating process Formula Presented is presented, using Formula Presented of Formula Presented Formula Presented collision data collected by the ATLAS experiment at the LHC. An excess in the Formula Presented invarian ...
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Journal ArticleEuropean Physical Journal C · August 1, 2023
A determination of the jet energy scale is presented using proton–proton collision data with a centre-of-mass energy of s=13 TeV, corresponding to an integrated luminosity of 140 fb-1 collected using the ATLAS detector at the LHC. Jets are recon ...
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Journal ArticleEuropean Physical Journal C · August 1, 2023
This paper presents the muon momentum calibration and performance studies for the ATLAS detector based on the pp collisions data sample produced at s = 13 TeV at the LHC during Run 2 and corresponding to an integrated luminosity of 139 fb - 1 . ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 10, 2023
Many extensions of the Standard Model predict the production of dark matter particles at the LHC. Sufficiently light dark matter particles may be produced in decays of the Higgs boson that would appear invisible to the detector. This Letter presents a stat ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 10, 2023
This letter documents a search for flavour-changing neutral currents (FCNCs), which are strongly suppressed in the Standard Model, in events with a photon and a top quark with the ATLAS detector. The analysis uses data collected in pp collisions at s=13 Te ...
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Journal ArticleEuropean Physical Journal C · July 1, 2023
The exclusive production of pion pairs in the process pp→ ppπ+π- has been measured at s=7TeV with the ATLAS detector at the LHC, using 80μb-1 of low-luminosity data. The pion pairs were detected in the ATLAS central detector while out ...
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Journal ArticleEuropean Physical Journal C · July 1, 2023
A search for a WZ resonance, in the fully leptonic final state (electrons or muons), is performed using 139 fb - 1 of data collected at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The results are interpr ...
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Journal ArticleEuropean Physical Journal C · July 1, 2023
The flavour-tagging algorithms developed by the ATLAS Collaboration and used to analyse its dataset of s=13 TeV pp collisions from Run 2 of the Large Hadron Collider are presented. These new tagging algorithms are based on recurrent and deep neural network ...
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Journal ArticlePhysical Review D · July 1, 2023
A search is presented for displaced production of Higgs bosons or Z bosons, originating from the decay of a neutral long-lived particle (LLP) and reconstructed in the decay modes H → γ γ and Z → e e . The analysis uses the full Run 2 dataset of proton-prot ...
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Journal ArticlePhysical Review D · July 1, 2023
We present measurements of cross sections for production of a leptonically decaying Z boson in association with a large-radius jet in 13 TeV proton-proton collisions at the LHC, using 36 fb - 1 of data from the ATLAS detector. Integrated and differential c ...
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Journal ArticleEuropean Physical Journal C · July 1, 2023
A search for supersymmetry involving the pair production of gluinos decaying via off-shell third-generation squarks into the lightest neutralino (χ~10) is reported. It exploits LHC proton–proton collision data at a centre-of-mass energy s=13 TeV with an in ...
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Journal ArticleEuropean Physical Journal C · July 1, 2023
A study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and τ -leptons is presented. The study is based on a measurement of CP -sensitive angular observables defined by the visible decay products of τ -lepton ...
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Journal ArticleEuropean Physical Journal C · July 1, 2023
This paper presents a search for dark matter, χ , using events with a single top quark and an energetic W boson. The analysis is based on proton–proton collision data collected with the ATLAS experiment at s= 13 TeV during LHC Run 2 (2015–2018), correspond ...
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Journal ArticleEuropean Physical Journal C · July 1, 2023
A search for pair production of doubly charged Higgs bosons (H± ±), each decaying into a pair of prompt, isolated, and highly energetic leptons with the same electric charge, is presented. The search uses a proton–proton collision data sample at ...
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Journal ArticleEuropean Physical Journal C · June 1, 2023
This paper reports a search for Higgs boson pair (hh) production in association with a vector boson (WorZ) using 139 fb - 1 of proton–proton collision data at s=13TeV recorded with the ATLAS detector at the Large Hadron Collider. The search is p ...
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Journal ArticleEuropean Physical Journal C · June 1, 2023
This paper presents a statistical combination of searches targeting final states with two top quarks and invisible particles, characterised by the presence of zero, one or two leptons, at least one jet originating from a b-quark and missing transverse mome ...
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Journal ArticleEuropean Physical Journal C · June 1, 2023
Searches for new phenomena inspired by supersymmetry in final states containing an e+e- or μ+μ- pair, jets, and missing transverse momentum are presented. These searches make use of proton–proton collision data w ...
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Journal ArticleEuropean Physical Journal C · June 1, 2023
This paper presents the observation of four-top-quark (tt¯ tt¯) production in proton-proton collisions at the LHC. The analysis is performed using an integrated luminosity of 140 fb - 1 at a centre-of-mass energy of 13 TeV collected using the AT ...
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Journal ArticleEuropean Physical Journal C · June 1, 2023
A measurement of observables sensitive to effects of colour reconnection in top-quark pair-production events is presented using 139 fb - 1 of 13 TeV proton–proton collision data collected by the ATLAS detector at the LHC. Events are selected by ...
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Journal ArticleEuropean Physical Journal C · June 1, 2023
Cross-sections for the production of a Z boson in association with two photons are measured in proton–proton collisions at a centre-of-mass energy of 13 TeV. The data used correspond to an integrated luminosity of 139 fb - 1 recorded by the ATLA ...
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Journal ArticleEuropean Physical Journal C · May 1, 2023
This paper presents a measurement of b-jet production in Pb+Pb and pp collisions at sNN=5.02 TeV with the ATLAS detector at the LHC. The measurement uses 260 pb - 1 of pp collisions collected in 2017 and 1.4 nb - 1 of Pb+Pb collisions ...
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Journal ArticleEuropean Physical Journal C · May 1, 2023
In a special run of the LHC with β⋆= 2.5 km, proton–proton elastic-scattering events were recorded at s=13 TeV with an integrated luminosity of 340μb-1 using the ALFA subdetector of ATLAS in 2016. The elastic cross section was measured different ...
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Journal ArticlePhysical Review C · May 1, 2023
Studies of the correlations of the two highest transverse momentum (leading) jets in individual Pb+Pb collision events can provide information about the mechanism of jet quenching by the hot and dense matter created in such collisions. In Pb+Pb and pp coll ...
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Journal ArticlePhysical Review C · May 1, 2023
The ATLAS detector at the Large Hadron Collider has been used to measure jet substructure modification and suppression in Pb+Pb collisions at a nucleon–nucleon center-of-mass energy √sNN = 5.02 TeV in comparison with proton–proton (pp ...
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Journal ArticlePhysical Review C · May 1, 2023
The correlations between flow harmonics vn for n = 2, 3, and 4 and mean transverse momentum [pT] in 129Xe + 129Xe and 208Pb + 208Pb collisions at √s = 5.44 and 5.02 TeV, respectiv ...
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Journal ArticlePhysical Review C · May 1, 2023
A measurement of the production of vector bottomonium states, ϒ(1S), ϒ(2S), and ϒ(3S), in Pb + Pb and pp collisions at a center-of-mass energy per nucleon pair of 5.02 TeV is presented. The data correspond to integrated luminosities of 1.38 nb-1 ...
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Journal ArticlePhysical Review C · May 1, 2023
Results of a measurement of dimuon photoproduction in nonultraperipheral Pb + Pb collisions at √sNN = 5.02 TeV are presented. Themeasurement uses ATLAS data from the 2015 and 2018 Pb + Pb data-taking periods at the LHC with an integrated luminosity of 1.94 ...
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Journal ArticleComputing and Software for Big Science · December 1, 2022
The accurate simulation of additional interactions at the ATLAS experiment for the analysis of proton–proton collisions delivered by the Large Hadron Collider presents a significant challenge to the computing resources. During the LHC Run 2 (2015–2018), th ...
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Journal ArticleComputing and Software for Big Science · December 1, 2022
The ATLAS experiment at the Large Hadron Collider has a broad physics programme ranging from precision measurements to direct searches for new particles and new interactions, requiring ever larger and ever more accurate datasets of simulated Monte Carlo ev ...
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Journal ArticleEuropean Physical Journal C · November 1, 2022
A search for the pair production of heavy leptons as predicted by the type-III seesaw mechanism is presented. The search uses proton–proton collision data at a centre-of-mass energy of 13 TeV, corresponding to 139fb-1 of integrated luminosity recorded by t ...
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Journal ArticleEuropean Physical Journal C · August 1, 2022
A search for the Higgs boson decaying into a pair of charm quarks is presented. The analysis uses proton–proton collisions to target the production of a Higgs boson in association with a leptonically decaying W or Z boson. The dataset delivered by the LHC ...
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Journal ArticleEuropean Physical Journal C · July 1, 2022
A search for long-lived charginos produced either directly or in the cascade decay of heavy prompt gluino states is presented. The search is based on proton–proton collision data collected at a centre-of-mass energy of s = 13 TeV between 2015 and 2018 with ...
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Journal ArticleEuropean Physical Journal C · July 1, 2022
This paper presents studies of Bose–Einstein correlations (BEC) in proton–proton collisions at a centre-of-mass energy of 13 TeV, using data from the ATLAS detector at the CERN Large Hadron Collider. Data were collected in a special low-luminosity configur ...
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Journal ArticleEuropean Physical Journal C · July 1, 2022
This article presents the results of two studies of Higgs boson properties using the WW∗(→ eνμν) jj final state, based on a dataset corresponding to 36.1 fb - 1 of s=13 TeV proton–proton collisions recorded by the ATLAS experiment at ...
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Journal ArticleNature · July 2022
The standard model of particle physics1-4 describes the known fundamental particles and forces that make up our Universe, with the exception of gravity. One of the central features of the standard model is a field that permeates all of space and ...
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Journal ArticleEuropean Physical Journal C · May 1, 2022
This paper presents an analysis at next-to-next-to-leading order in the theory of quantum chromodynamics for the determination of a new set of proton parton distribution functions using diverse measurements in pp collisions at s=7, 8 and 13 TeV, performed ...
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Journal ArticleEuropean Physical Journal C · April 1, 2022
A measurement of the energy asymmetry in jet-associated top-quark pair production is presented using 139fb-1 of data collected by the ATLAS detector at the Large Hadron Collider during pp collisions at s=13TeV. The observable measures the different probabi ...
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Journal ArticleEuropean Physical Journal C · April 1, 2022
A search is presented for the production of a single top quark via left-handed flavour-changing neutral-current (FCNC) interactions of a top quark, a gluon and an up or charm quark. Two production processes are considered: u+ g→ t and c+ g→ t. The analysis ...
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Journal ArticleJournal of High Energy Physics · March 1, 2022
Searches are conducted for new spin-0 or spin-1 bosons using events where a Higgs boson with mass 125 GeV decays into four leptons (ℓ = e, μ). This decay is presumed to occur via an intermediate state which contains two on-shell, promptly decaying bosons: ...
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Journal ArticleEuropean Physical Journal C · March 1, 2022
The energy response of the ATLAS calorimeter is measured for single charged pions with transverse momentum in the range 10 < pT< 300 GeV. The measurement is performed using 139 fb - 1 of LHC proton–proton collision data at s=13 TeV ta ...
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Journal ArticleEuropean Physical Journal C · March 1, 2022
The design and performance of the inner detector trigger for the high level trigger of the ATLAS experiment at the Large Hadron Collider during the 2016–2018 data taking period is discussed. In 2016, 2017, and 2018 the ATLAS detector recorded 35.6fb-1, 46. ...
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Journal ArticleEuropean Physical Journal C · February 1, 2022
This paper presents a measurement of the electroweak production of two jets in association with a Zγ pair, with the Z boson decaying into two neutrinos. It also presents a search for invisible or partially invisible decays of a Higgs boson with a mass of 1 ...
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Journal ArticleEuropean Physical Journal C · January 1, 2022
During LHC Run 2 (2015–2018) the ATLAS Level-1 topological trigger allowed efficient data-taking by the ATLAS experiment at luminosities up to 2.1× 1034 cm- 2s- 1, which exceeds the design value by a factor of two. The syst ...
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Journal ArticleJournal of High Energy Physics · January 1, 2022
A search for the exotic decay of the Higgs boson (H) into a bb¯ resonance plus missing transverse momentum is described. The search is performed with the ATLAS detector at the Large Hadron Collider using 139 fb−1 of pp collisions at s = 13 TeV. ...
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Journal ArticleJournal of Instrumentation · January 1, 2022
The semiconductor tracker (SCT) is one of the tracking systems for charged particles in the ATLAS detector. It consists of 4088 silicon strip sensor modules. During Run 2 (2015-2018) the Large Hadron Collider delivered an integrated luminosity of 156 fb
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Journal ArticleEuropean Physical Journal C · December 1, 2021
Several improvements to the ATLAS triggers used to identify jets containing b-hadrons (b-jets) were implemented for data-taking during Run 2 of the Large Hadron Collider from 2016 to 2018. These changes include reconfiguring the b-jet trigger software to i ...
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Journal ArticleJournal of High Energy Physics · December 1, 2021
The fragmentation properties of jets containing b-hadrons are studied using charged B mesons in 139 fb−1 of pp collisions at s = 13 TeV, recorded with the ATLAS detector at the LHC during the period from 2015 to 2018. The B mesons are reconstruc ...
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Journal ArticleEuropean Physical Journal C · December 1, 2021
A search for chargino–neutralino pair production in three-lepton final states with missing transverse momentum is presented. The study is based on a dataset of s=13 TeV pp collisions recorded with the ATLAS detector at the LHC, corresponding to an integrat ...
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Journal ArticleJournal of High Energy Physics · December 1, 2021
An error in the normalization of the Aplanarity and D-parameter has been found. Insufficient precision on the eigenvalue calculation can cause λ3 to be negative, exclusively in two-jet events, yielding an underestimation of the inclusive two-jet ...
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Journal ArticleJournal of High Energy Physics · November 1, 2021
A measurement of four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 139 fb−1 is presented. E ...
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Journal ArticleEuropean Physical Journal C · November 1, 2021
A search for R-parity-violating supersymmetry in final states characterized by high jet multiplicity, at least one isolated light lepton and either zero or at least three b-tagged jets is presented. The search uses 139fb-1 of s=13TeV proton–proton collisio ...
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Journal ArticleJournal of High Energy Physics · November 1, 2021
One correction is noted for the paper, which does not affect the results reported. The right panel of figure 9 is corrected as it contained the “internal” label, giving the misleading impression on the credibility of the figure. ...
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Journal ArticleJournal of High Energy Physics · November 1, 2021
A measurement of prompt photon-pair production in proton-proton collisions at s = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb−1. Events with two photons in the well-instrum ...
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Journal ArticleJournal of High Energy Physics · November 1, 2021
The production of dark matter in association with Higgs bosons is predicted in several extensions of the Standard Model. An exploration of such scenarios is presented, considering final states with missing transverse momentum and b-tagged jets consistent w ...
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Journal ArticleJournal of High Energy Physics · November 1, 2021
A novel search for exotic decays of the Higgs boson into pairs of long-lived neutral particles, each decaying into a bottom quark pair, is performed using 139 fb−1 of s = 13 TeV proton-proton collision data collected with the ATLAS detector at t ...
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Journal ArticleJournal of High Energy Physics · October 1, 2021
A search for dark-matter particles in events with large missing transverse momentum and a Higgs boson candidate decaying into two photons is reported. The search uses 139 fb−1 of proton-proton collision data collected at s = 13 TeV with the ATLA ...
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Journal ArticleEuropean Physical Journal C · October 1, 2021
This paper presents a search for dark matter in the context of a two-Higgs-doublet model together with an additional pseudoscalar mediator, a, which decays into the dark-matter particles. Processes where the pseudoscalar mediator is produced in association ...
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Journal ArticleEuropean Physical Journal C · October 1, 2021
In this article the title was incorrectly given as ‘Search for squarks and gluinos in final states with one isolated lepton, jets, and missing transverse momentum at √s = 13 with the ATLAS detector’ but should have been ‘Search for squarks and gluinos in f ...
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Journal ArticleEuropean Physical Journal C · August 1, 2021
The production cross-section of a top quark in association with a W boson is measured using proton–proton collisions at s=8TeV. The dataset corresponds to an integrated luminosity of 20.2fb-1, and was collected in 2012 by the ATLAS detector at the Large Ha ...
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Journal ArticleEuropean Physical Journal C · August 1, 2021
Jet energy scale and resolution measurements with their associated uncertainties are reported for jets using 36–81 fb- 1 of proton–proton collision data with a centre-of-mass energy of s=13 TeV collected by the ATLAS detector at the LHC. Jets ar ...
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Journal ArticleEuropean Physical Journal C · August 1, 2021
Measurements of both the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson (tt¯ Z) are presented. The measurements are performed by targeting final states with three or four isolated leptons (e ...
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Journal ArticleJournal of Instrumentation · August 1, 2021
Non-ionizing energy loss causes bulk damage to the silicon sensors of the ATLAS pixel and strip detectors. This damage has important implications for data-taking operations, charged-particle track reconstruction, detector simulations, and physics analysis. ...
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Journal ArticleNature Physics · July 1, 2021
Leptons with essentially the same properties apart from their mass are grouped into three families (or flavours). The number of leptons of each flavour is conserved in interactions, but this is not imposed by fundamental principles. Since the formulation o ...
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Journal ArticleJournal of High Energy Physics · July 1, 2021
Measurements of four-lepton differential and integrated fiducial cross-sections in events with two same-flavour, opposite-charge electron or muon pairs are presented. The data correspond to 139 fb−1 of s = 13 TeV proton-proton collisions, collec ...
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Journal ArticleNature Physics · July 1, 2021
The standard model of particle physics encapsulates our best current understanding of physics at the smallest scales. A fundamental axiom of this theory is the universality of the couplings of the different generations of leptons to the electroweak gauge b ...
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Journal ArticleEuropean Physical Journal C · July 1, 2021
The results of a search for gluino and squark pair production with the pairs decaying via the lightest charginos into a final state consisting of two W bosons, the lightest neutralinos (χ~10), and quarks, are presented: the signal is characterised by the p ...
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Journal ArticleJournal of High Energy Physics · July 1, 2021
A search for long-lived particles, which have come to rest within the ATLAS detector, is presented. The subsequent decays of these particles can produce high-momentum jets, resulting in large out-of-time energy deposits in the ATLAS calorimeters. These de- ...
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Journal ArticleJournal of High Energy Physics · July 1, 2021
A search for supersymmetry in events with four or more charged leptons (electrons, muons and τ-leptons) is presented. The analysis uses a data sample corresponding to 139 fb−1 of proton-proton collisions delivered by the Large Hadron Collider at ...
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Journal ArticleEuropean Physical Journal C · July 1, 2021
This article documents the muon reconstruction and identification efficiency obtained by the ATLAS experiment for 139 fb - 1 of pp collision data at s=13 TeV collected between 2015 and 2018 during Run 2 of the LHC. The increased instantaneous lu ...
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Journal ArticleJournal of High Energy Physics · July 1, 2021
This article presents a new set of proton parton distribution functions, ATLASepWZVjet20, produced in an analysis at next-to-next-to-leading order in QCD. The new data sets considered are the measurements of W+ and W− boson and Z boso ...
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Journal ArticleJournal of Instrumentation · July 1, 2021
The ATLAS experiment at the Large Hadron Collider (LHC) employs a trigger system consisting of a first-level hardware trigger (L1) and a software-based high-level trigger. The L1 muon trigger system selects muon candidates, assigns them to the correct LHC ...
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Journal ArticleJournal of Instrumentation · July 1, 2021
The ATLAS Fast TracKer (FTK) was designed to provide full tracking for the ATLAS high-level trigger by using pattern recognition based on Associative Memory (AM) chips and fitting in high-speed field programmable gate arrays. The tracks found by the FTK ar ...
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Journal ArticleJournal of High Energy Physics · June 1, 2021
Fiducial and differential cross-section measurements of W+W− production in association with at least one hadronic jet are presented. These measurements are sensitive to the properties of electroweak-boson self-interactions and provide ...
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Journal ArticleEuropean Physical Journal C · June 1, 2021
The paper presents a measurement of the Standard Model Higgs Boson decaying to b-quark pairs in the vector boson fusion (VBF) production mode. A sample corresponding to 126 fb - 1 of s=13TeV proton–proton collision data, collected with the ATLAS ...
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Journal ArticleJournal of High Energy Physics · June 1, 2021
A search for charged Higgs bosons decaying into a top quark and a bottom quark is presented. The data analysed correspond to 139 fb−1 of proton-proton collisions at s = 13 TeV, recorded with the ATLAS detector at the LHC. The production of a hea ...
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Journal ArticleJournal of High Energy Physics · June 1, 2021
A search for charged Higgs bosons decaying into W±W± or W±Z bosons is performed, involving experimental signatures with two leptons of the same charge, or three or four leptons with a variety of charge combinations, missing ...
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Journal ArticleJournal of High Energy Physics · June 1, 2021
A search for pair production of third-generation scalar leptoquarks decaying into a top quark and a τ-lepton is presented. The search is based on a dataset of pp collisions at s = 13 TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Col ...
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Journal ArticleEuropean Physical Journal C · May 1, 2021
When quoting the final cross section result in the text of the paper (Eur. Phys. J. C 80 (2020) 957), the theory component of the uncertainty was incorrectly set to 0.04 pb while the correct value of 0.03 pb was given in Table 8 and in all other results re ...
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Journal ArticleEuropean Physical Journal C · May 1, 2021
A search for a heavy neutral Higgs boson, A, decaying into a Z boson and another heavy Higgs boson, H, is performed using a data sample corresponding to an integrated luminosity of 139 fb- 1 from proton–proton collisions at s=13 TeV recorded by ...
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Journal ArticleJournal of High Energy Physics · May 1, 2021
The results of a search for new phenomena in final states with b-jets and missing transverse momentum using 139 fb−1 of proton-proton data collected at a centre-of-mass energy s = 13 TeV by the ATLAS detector at the LHC are reported. The analysi ...
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Journal ArticleEuropean Physical Journal C · April 1, 2021
A search for pair production of scalar leptoquarks, each decaying into either an electron or a muon and a top quark, is presented. This is the first leptoquark search using ATLAS data to investigate top-philic cross-generational couplings that could provid ...
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Journal ArticleJournal of High Energy Physics · April 1, 2021
The Lagrangian in eq. (2.1) of JHEP11 (2020) 005 has an erroneous factor of 1/2. The analysis code used for the results reported in the paper does not have this factor. The results remain unchanged. ...
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Journal ArticleEuropean Physical Journal C · April 1, 2021
A search for heavy resonances decaying into a pair of Z bosons leading to ℓ+ℓ-ℓ′ +ℓ′ - and ℓ+ℓ-νν¯ final states, where ℓ stands for either an electron or a muon, is presented. The search use ...
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Journal ArticleEuropean Physical Journal C · April 1, 2021
Jet substructure has provided new opportunities for searches and measurements at the LHC, and has seen continuous development since the optimization of the large-radius jet definition used by ATLAS was performed during Run 1. A range of new inputs to jet r ...
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Journal ArticleJournal of High Energy Physics · April 1, 2021
The results of a search for direct pair production of top squarks and for dark matter in events with two opposite-charge leptons (electrons or muons), jets and missing transverse momentum are reported, using 139 fb−1 of integrated luminosity fro ...
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Journal ArticleJournal of High Energy Physics · April 1, 2021
A search for new phenomena with top quark pairs in final states with one isolated electron or muon, multiple jets, and large missing transverse momentum is performed. Signal regions are designed to search for two-, three-, and four-body decays of the direc ...
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Journal ArticleEuropean Physical Journal C · April 1, 2021
A measurement of the Bs0→J/ψϕ decay parameters using 80.5fb-1 of integrated luminosity collected with the ATLAS detector from 13 Te proton–proton collisions at the LHC is presented. The measured parameters include the CP-violating phase ϕs, the ...
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Journal ArticleEuropean Physical Journal C · March 1, 2021
A search for the pair production of heavy leptons as predicted by the type-III seesaw mechanism is presented. The search uses proton–proton collision data at a centre-of-mass energy of 13 TeV, corresponding to 139fb-1 of integrated luminosity recorded by t ...
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Journal ArticleEuropean Physical Journal C · March 1, 2021
In the original HTML version of this article, one affiliation of the author V. O. Tikhomirov was missing. He is affiliated to the following two affiliations: P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia National Resear ...
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Journal ArticleJournal of High Energy Physics · March 1, 2021
This paper describes a measurement of light-by-light scattering based on Pb+Pb collision data recorded by the ATLAS experiment during Run 2 of the LHC. The study uses 2.2 nb−1 of integrated luminosity collected in 2015 and 2018 at sNN = 5.02 TeV ...
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Journal ArticleJournal of High Energy Physics · March 1, 2021
A search is presented for the production of the Standard Model Higgs boson in association with a high-energy photon. With a focus on the vector-boson fusion process and the dominant Higgs boson decay into b-quark pairs, the search benefits from a large red ...
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Journal ArticleEuropean Physical Journal C · February 1, 2021
Measurements of the Standard Model Higgs boson decaying into a bb¯ pair and produced in association with a W or Z boson decaying into leptons, using proton–proton collision data collected between 2015 and 2018 by the ATLAS detector, are presented. The meas ...
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Journal ArticleEuropean Physical Journal C · February 1, 2021
Differential cross-section measurements are presented for the electroweak production of two jets in association with a Z boson. These measurements are sensitive to the vector-boson fusion production mechanism and provide a fundamental test of the gauge str ...
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Journal ArticleJournal of High Energy Physics · February 1, 2021
A search for the supersymmetric partners of quarks and gluons (squarks and gluinos) in final states containing jets and missing transverse momentum, but no electrons or muons, is presented. The data used in this search were recorded by the ATLAS experiment ...
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Journal ArticleJournal of High Energy Physics · February 1, 2021
A search for dark matter is conducted in final states containing a photon and missing transverse momentum in proton-proton collisions at s = 13 TeV. The data, collected during 2015–2018 by the ATLAS experiment at the CERN LHC, correspond to an integrated l ...
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Journal ArticleEuropean Physical Journal C · January 1, 2021
A search is presented for new phenomena in events characterised by high jet multiplicity, no leptons (electrons or muons), and four or more jets originating from the fragmentation of b-quarks (b-jets). The search uses 139fb-1 of s = 13 TeV proton–proton co ...
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Journal ArticleJournal of High Energy Physics · January 1, 2021
A measurement of event-shape variables in proton-proton collisions at large momentum transfer is presented using data collected at s = 13 TeV with the ATLAS detector at the Large Hadron Collider. Six event-shape variables calculated using hadronic jets are ...
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Journal ArticleEuropean Physical Journal C · January 1, 2021
In the published HTML version of this article, the affiliations of the authors of the National Research Nuclear University MEPhI, Moscow, Russia were unfortunately marked incorrectly. ...
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Journal ArticleEuropean Physical Journal C · December 1, 2020
The performance of the ATLAS Inner Detector alignment has been studied using pp collision data at s=13TeV collected by the ATLAS experiment during Run 2 (2015–2018) of the Large Hadron Collider (LHC). The goal of the detector alignment is to determine the ...
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Journal ArticleEuropean Physical Journal C · December 1, 2020
This paper reports on a search for heavy resonances decaying into WW, ZZ or WZ using proton–proton collision data at a centre-of-mass energy of s=13 TeV. The data, corresponding to an integrated luminosity of 139 fb 1, were recorded with the ATL ...
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Journal ArticleJournal of High Energy Physics · November 1, 2020
A search for new physics with non-resonant signals in dielectron and dimuon final states in the mass range above 2 TeV is presented. This is the first search for non-resonant signals in dilepton final states at the LHC to use a background estimate from the ...
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Journal ArticleEuropean Physical Journal C · November 1, 2020
This paper presents a search for direct top squark pair production in events with missing transverse momentum plus either a pair of jets consistent with Standard Model Higgs boson decay into b-quarks or a same-flavour opposite-sign dilepton pair with an in ...
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Journal ArticleEuropean Physical Journal C · November 1, 2020
A search is presented for four-top-quark production using an integrated luminosity of 139 fb- 1 of proton–proton collision data at a centre-of-mass energy of 13TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a ...
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Journal ArticleJournal of High Energy Physics · November 1, 2020
In this paper, a new technique for reconstructing and identifying hadronically decaying τ+τ− pairs with a large Lorentz boost, referred to as the di-τ tagger, is developed and used for the first time in the ATLAS experiment at the Lar ...
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Journal ArticleJournal of High Energy Physics · October 1, 2020
This paper presents a search for new heavy particles decaying into a pair of top quarks using 139 fb−1 of proton-proton collision data recorded at a centre-of-mass energy of s = 13 TeV with the ATLAS detector at the Large Hadron Collider. The se ...
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Journal ArticleEuropean Physical Journal C · October 1, 2020
Higgs boson properties are studied in the four-lepton decay channel (where lepton = e, μ) using 139 fb - 1 of proton–proton collision data recorded at s=13 TeV by the ATLAS experiment at the Large Hadron Collider. The inclusive cross-section tim ...
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Journal ArticleEuropean Physical Journal C · October 1, 2020
Inclusive and differential fiducial cross sections of the Higgs boson are measured in the H→ ZZ∗→ 4 ℓ (ℓ= e, μ) decay channel. The results are based on proton−proton collision data produced at the Large Hadron Collider at a centre-of-mass energy ...
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Journal ArticleJournal of High Energy Physics · October 1, 2020
A search for new-physics resonances decaying into a lepton and a jet performed by the ATLAS experiment is presented. Scalar leptoquarks pair-produced in pp collisions at s = 13 TeV at the Large Hadron Collider are considered using an integrated luminosity ...
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Journal ArticleEuropean Physical Journal C · August 1, 2020
The results of a search for electroweakino pair production pp→χ~1±χ~20 in which the chargino (χ~1±) decays into a W boson and the lightest neutralino (χ~10), while the heavier neutralino (χ~20) decays into the Standard Model 125 GeV Higgs boson and a secon ...
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Journal ArticleEuropean Physical Journal C · August 1, 2020
A measurement of observables sensitive to spin correlations in tt¯ production is presented, using 36.1 fb - 1 of pp collision data at s=13 TeV recorded with the ATLAS detector at the Large Hadron Collider. Differential cross-sections are measure ...
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Journal ArticleEuropean Physical Journal C · August 1, 2020
A search for direct pair production of scalar partners of the top quark (top squarks or scalar third-generation up-type leptoquarks) in the all-hadronic tt¯ plus missing transverse momentum final state is presented. The analysis of 139 fb - 1 of ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2018
A search for a heavy neutral Higgs boson, A, decaying into a Z boson and another heavy Higgs boson, H, is performed using a data sample corresponding to an integrated luminosity of 36.1 fb−1 from proton–proton collisions at s=13 TeV recorded in ...
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Journal ArticleJournal of High Energy Physics · July 1, 2018
A search for pair production of up-type vector-like quarks (T) with a significant branching ratio into a top quark and either a Standard Model Higgs boson or a Z boson is presented. The same analysis is also used to search for four-top-quark production in ...
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Journal ArticleJournal of High Energy Physics · June 1, 2018
The results of a search for the direct pair production of top squarks, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, several energetic jets, and missing transverse momentum are reported. The analysis also ...
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Journal ArticleJournal of High Energy Physics · June 1, 2018
A search is conducted for a beyond-the-Standard-Model boson using events where a Higgs boson with mass 125 GeV decays to four leptons (ℓ = e or μ). This decay is presumed to occur via an intermediate state which contains one or two on-shell, promptly decay ...
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Journal ArticlePhysical Review D · May 1, 2018
V. Krutelyov, of Texas A&M University and the University of California at Santa Barbara, was erroneously omitted from the author list. ...
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Journal ArticleJournal of High Energy Physics · March 1, 2018
A search is conducted for new resonances decaying into a W or Z boson and a 125 GeV Higgs boson in the νν¯ bb¯ , ℓ±νbb¯ , and ℓ+ℓ−bb¯ final states, where ℓ± = e± or μ±, in pp collisions at s ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2018
A search for new heavy particles that decay into top-quark pairs is performed using data collected from proton-proton collisions at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The integrated luminosity of the data ...
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Journal ArticlePhysical review letters · November 2017
Several extensions of the standard model predict associated production of dark-matter particles with a Higgs boson. Such processes are searched for in final states with missing transverse momentum and a Higgs boson decaying to a bb[over ¯] pair with the AT ...
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Journal ArticleEuropean Physical Journal C · October 1, 2017
Unfortunately, in the original version of this article the copyright holder was wrong in the HTML. The original article has been corrected. ...
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Journal ArticleJournal of High Energy Physics · October 1, 2017
Inclusive and differential fiducial cross sections of Higgs boson production in proton-proton collisions are measured in the H → ZZ* → 4ℓ decay channel. The proton-proton collision data were produced at the Large Hadron Collider at a centre-of-m ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · December 10, 2016
A search is presented for dark matter produced in association with a hadronically decaying W or Z boson using 3.2 fb−1 of pp collisions at s=13 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with a hadronic jet compatibl ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · December 10, 2016
Measurements of the per-event charged-particle yield as a function of the charged-particle transverse momentum and rapidity are performed using p+Pb collision data collected by the ATLAS experiment at the LHC at a centre-of-mass energy of sNN=5. ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · December 10, 2016
The production of Wboson pairs in association with one jet in pp collisions at √s = 8 TeV is studied using data corresponding to an integrated luminosity of 20.3 fb-1collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. ...
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Journal ArticlePhysical Review D · November 11, 2016
Measurements of normalized differential cross sections of top quark pair (tt production are presented as a function of the mass, the transverse momentum and the rapidity of the tt system in proton-proton collisions at center-of-mass energies of s=7 and 8 T ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 10, 2016
The production of W±Z events in proton–proton collisions at a centre-of-mass energy of 13 TeV is measured with the ATLAS detector at the LHC. The collected data correspond to an integrated luminosity of 3.2 fb−1. The W±Z ca ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 10, 2016
A search for W′ bosons in events with one lepton (electron or muon) and missing transverse momentum is presented. The search uses 3.2 fb−1 of pp collision data collected at s=13 TeV by the ATLAS experiment at the LHC in 2015. The tran ...
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Journal ArticleJournal of High Energy Physics · November 1, 2016
A search with the ATLAS detector is presented for the Standard Model Higgs boson produced by vector-boson fusion and decaying to a pair of bottom quarks, using 20.2 fb−1 of LHC proton-proton collision data at s=8 TeV. The signal is searched for ...
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Journal ArticleJournal of High Energy Physics · November 1, 2016
Inclusive four-jet events produced in proton-proton collisions at a centre-of-mass energy of s=7 TeV are analysed for the presence of hard double-parton scattering using data corresponding to an integrated luminosity of 37.3 pb−1, collected with ...
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Journal ArticleJournal of Instrumentation · November 1, 2016
Knowledge of the material in the ATLAS inner tracking detector is crucial in understanding the reconstruction of charged-particle tracks, the performance of algorithms that identify jets containing b-hadrons and is also essential to reduce background in se ...
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Journal ArticlePhys Rev Lett · October 28, 2016
This Letter presents a measurement of the inelastic proton-proton cross section using 60 μb^{-1} of pp collisions at a center-of-mass energy sqrt[s] of 13 TeV with the ATLAS detector at the LHC. Inelastic interactions are selected using rings of plastic s ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · October 10, 2016
This paper describes a measurement of the inclusive top quark pair production cross-section (σtt¯) with a data sample of 3.2fb−1 of proton–proton collisions at a centre-of-mass energy of s=13TeV, collected in 2015 by the ATLAS detecto ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · October 10, 2016
The top quark mass is measured in the tt¯→dilepton channel (lepton=e,μ) using ATLAS data recorded in the year 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of s=8 TeV and correspond to an integrated luminosity of about 20.2 ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · October 10, 2016
A search is conducted for both resonant and non-resonant high-mass new phenomena in dielectron and dimuon final states. The search uses 3.2fb−1 of proton–proton collision data, collected at s=13TeV by the ATLAS experiment at the LHC in 2015. The ...
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Journal ArticlePhysical Review D · September 19, 2016
The results of a search for the top squark, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, jets, and missing transverse momentum are reported. The search uses the 2015 LHC pp collision data at a center-of-m ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 10, 2016
A search for physics beyond the Standard Model, in final states with at least one high transverse momentum charged lepton (electron or muon) and two additional high transverse momentum leptons or jets, is performed using 3.2 fb−1 of proton–proto ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 10, 2016
A search for heavy long-lived charged R-hadrons is reported using a data sample corresponding to 3.2 fb−1 of proton–proton collisions at s=13 TeV collected by the ATLAS experiment at the Large Hadron Collider at CERN. The search is based on obse ...
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Journal ArticlePhysical Review D · September 2, 2016
A search for Higgs-boson pair production in the bbbb final state is carried out with 3.2 fb-1 of proton-proton collision data collected at s=13 TeV with the ATLAS detector. The data are consistent with the estimated background and are used to set upper lim ...
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Journal ArticleJournal of High Energy Physics · September 1, 2016
Searches for new resonances decaying into two photons in the ATLAS experiment at the CERN Large Hadron Collider are described. The analysis is based on proton-proton collision data corresponding to an integrated luminosity of 3.2 fb−1 at s=13 Te ...
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Journal ArticleJournal of High Energy Physics · September 1, 2016
The production of W boson pairs in proton-proton collisions at s=8 TeV is studied using data corresponding to 20.3 fb−1 of integrated luminosity collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The W bosons are reco ...
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Journal ArticlePhysical review letters · September 2016
A search for the decays of the Higgs and Z bosons to a ϕ meson and a photon is performed with a pp collision data sample corresponding to an integrated luminosity of 2.7 fb^{-1} collected at sqrt[s]=13 TeV with the ATLAS detector at the LHC. No significa ...
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Journal ArticleJournal of High Energy Physics · September 1, 2016
Measurements of the jet activity in tt¯ events produced in proton-proton collisions at s=8 TeV are presented, using 20.3 fb−1 of data collected by the ATLAS experiment at the Large Hadron Collider. The events were selected in the dilepton eμ dec ...
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Journal ArticleJournal of High Energy Physics · September 1, 2016
Searches for new heavy resonances decaying to WW, WZ, and ZZ bosons are presented, using a data sample corresponding to 3.2 fb−1 of pp collisions at s=13 TeV collected with the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting ...
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Journal ArticleJournal of High Energy Physics · September 1, 2016
A selection of searches by the ATLAS experiment at the LHC for the electroweak production of SUSY particles are used to study their impact on the constraints on dark matter candidates. The searches use 20 fb−1 of proton-proton collision data at ...
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Journal ArticlePhysical Review D · August 31, 2016
Searches for exclusively produced W boson pairs in the process pp(γγ)→pW+W-p and an exclusively produced Higgs boson in the process pp(gg)→pHp have been performed using e±μ final states. These measurements use 20.2 fb-1 of pp collisions collected by the AT ...
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Journal ArticlePhysical Review D · August 23, 2016
We present a measurement of the total WW and WZ production cross sections in pp collision at s=1.96 TeV, in a final state consistent with leptonic W boson decay and jets originating from heavy-flavor quarks from either a W or a Z boson decay. This analysis ...
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Journal ArticlePhysical Review D · August 22, 2016
Measurements of the top-antitop quark pair production charge asymmetry in the dilepton channel, characterized by two high-pT leptons (electrons or muons), are presented using data corresponding to an integrated luminosity of 20.3 fb-1 from pp collisions at ...
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Journal ArticlePhysical Review D · August 22, 2016
Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses proton-proton collision data corresponding to an integrated luminosity of 3.2 fb-1 at s=13 TeV collected in 2015 ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2016
Charged Higgs bosons produced in association with a single top quark and decaying via H±→τν are searched for with the ATLAS experiment at the LHC, using proton–proton collision data at s=13 TeV corresponding to an integrated luminosity of 3.2 fb ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2016
Searches for high-mass resonances in the dijet invariant mass spectrum with one or two jets identified as b-jets are performed using an integrated luminosity of 3.2 fb−1 of proton–proton collisions with a centre-of-mass energy of s=13 TeV record ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2016
Measurements of the W±→ℓ±ν and Z→ℓ+ℓ− production cross sections (where ℓ±=e±,μ±) in proton–proton collisions at s=13 TeV are presented using data recorded by the ATLAS experiment ...
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Journal ArticlePhysical Review D · August 9, 2016
A search for supersymmetry involving the pair production of gluinos decaying via third-generation squarks to the lightest neutralino (χ10) is reported. It uses an LHC proton-proton data set at a center-of-mass energy s=13 TeV with an integrated luminosity ...
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Journal ArticleJournal of High Energy Physics · August 1, 2016
This paper presents a measurement of the double-differential cross section for the Drell-Yan Z/γ∗ → ℓ+ℓ− and photon-induced γγ → ℓ+ℓ− processes where ℓ is an electron or muon. The measurement is perfor ...
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Journal ArticleJournal of High Energy Physics · August 1, 2016
Abstract: A measurement of the cross section for the inclusive production of isolated prompt photons in proton-proton collisions at a centre-of-mass energy of s=8 TeV is presented. The measurement covers the pseudorapidity ranges |ηγ | < 1.37 an ...
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Journal ArticleJournal of High Energy Physics · August 1, 2016
This paper describes a measurement of fiducial and differential cross sections of gluon-fusion Higgs boson production in the H → W W∗→ eνμν channel, using 20.3 fb−1 of proton-proton collision data. The data were produced at a centre-o ...
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Journal ArticleJournal of High Energy Physics · August 1, 2016
Combined ATLAS and CMS measurements of the Higgs boson production and decay rates, as well as constraints on its couplings to vector bosons and fermions, are presented. The combination is based on the analysis of five production processes, namely gluon fus ...
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Journal ArticleJournal of High Energy Physics · August 1, 2016
A measurement of the Bs0decay parameters in the Bs0→ J/ψϕ channel using an integrated luminosity of 14.3 fb−1collected by the ATLAS detector from 8 TeV pp collisions at the LHC is presented. The measur ...
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Journal ArticleJournal of High Energy Physics · August 1, 2016
The angular distributions of Drell-Yan charged lepton pairs in the vicinity of the Z-boson mass peak probe the underlying QCD dynamics of Z-boson production. This paper presents a measurement of the complete set of angular coefficients A0−7 desc ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 10, 2016
Charged-particle distributions are measured in proton–proton collisions at a centre-of-mass energy of 13 TeV, using a data sample of nearly 9 million events, corresponding to an integrated luminosity of 170 μb−1, recorded by the ATLAS detector d ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 10, 2016
A search is performed for the process pp→G*→BHb-/B-Hb→Hbb-→bb-bb-, predicted in composite Higgs scenarios, where G* is a heavy colour octet vector resonance and BH a vector-like quark of charge -1/3. The data were obtained from pp col ...
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Journal ArticleNew Journal of Physics · July 1, 2016
Anew search signature for excited leptons is explored. Excited muons are sought in the channel pp → μμ∗→ μμ jet jet, assuming both the production and decay occur via a contact interaction. The analysis is based on 20.3 fb-1 of pp collision data at a centre ...
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Journal ArticlePhysical Review D · June 28, 2016
At the Fermilab Tevatron proton-antiproton (pp) collider, Drell-Yan lepton pairs are produced in the process pp→e+e-+X through an intermediate γ∗/Z boson. The forward-backward asymmetry in the polar-angle distribution of the e- as a function of the e+e - p ...
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Journal ArticlePhysical Review D · June 28, 2016
This paper presents a search for massive charged long-lived particles produced in pp collisions at s=13 TeV at the LHC using the ATLAS experiment. The data set used corresponds to an integrated luminosity of 3.2 fb-1. Many extensions of the Standard Model ...
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Journal ArticlePhysical Review D · June 20, 2016
A search for a Higgs boson with suppressed couplings to fermions, hf, assumed to be the neutral, lower-mass partner of the Higgs boson discovered at the Large Hadron Collider, is reported. Such a Higgs boson could exist in extensions of the standard model ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · June 10, 2016
Results are reported of a search for new phenomena, such as supersymmetric particle production, that could be observed in high-energy proton–proton collisions. Events with large numbers of jets, together with missing transverse momentum from unobserved par ...
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Journal ArticlePhysical Review D · June 3, 2016
We measure the forward-backward asymmetry of the production of top-quark and antiquark pairs in proton-antiproton collisions at center-of-mass energy s=1.96 TeV using the full data set collected by the Collider Detector at Fermilab (CDF) in Tevatron Run II ...
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Journal ArticlePhysical Review D · June 2, 2016
We report a measurement of the forward-backward asymmetry, AFB, in bb pairs produced in proton-antiproton collisions and identified by muons from semileptonic b-hadron decays. The event sample is collected at a center-of-mass energy of s=1.96 TeV with the ...
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Journal ArticlePhysical Review D · June 2, 2016
The production of Z bosons with one or two isolated high-energy photons is studied using pp collisions at s=8 TeV. The analyses use a data sample with an integrated luminosity of 20.3 fb-1 collected by the ATLAS detector during the 2012 LHC data taking. Th ...
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Journal ArticleNuclear Physics B · June 1, 2016
The production of D⁎±, D± and Ds± charmed mesons has been measured with the ATLAS detector in pp collisions at s=7 TeV at the LHC, using data corresponding to an integrated luminosity of 280 nb−1. The ...
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Journal ArticleJournal of High Energy Physics · June 1, 2016
A search for the pair production of top squarks, each with R-parity-violating decays into two Standard Model quarks, is performed using 17.4 fb−1 of √s = 8 TeV proton-proton collision data recorded by the ATLAS experiment at the LHC. Each top sq ...
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Journal ArticleJournal of High Energy Physics · June 1, 2016
Results of a search for new phenomena in events with an energetic photon and large missing transverse momentum with the ATLAS experiment at the Large Hadron Collider are reported. The data were collected in proton-proton collisions at a centre-of-mass ener ...
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Journal ArticleJournal of High Energy Physics · June 1, 2016
This paper presents studies of the performance of several jet-substructure techniques, which are used to identify hadronically decaying top quarks with high transverse momentum contained in large-radius jets. The efficiency of identifying top quarks is mea ...
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Journal ArticleJournal of High Energy Physics · June 1, 2016
Abstract: This paper presents the measurement of the relative width difference ΔΓd/Γd of the B0‐ B¯ 0 system using the data collected by the ATLAS experiment at the LHC in pp collisions at s=7 TeV and s=8 TeV and ...
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Journal ArticleJournal of Instrumentation · May 20, 2016
This paper discusses various observations on beam-induced and cosmic-ray backgrounds in the ATLAS detector during the LHC 2012 proton-proton run. Building on published results based on 2011 data, the correlations between background and residual pressure of ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · May 17, 2016
A search for the standard model Higgs boson produced in association with a vector boson with the decay H→ττ is presented. The data correspond to 20.3 fb-1 of integrated luminosity from proton-proton collisions at s=8 TeV recorded by the ATLAS experiment at ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · May 13, 2016
This paper presents measurements of W±Z production in pp collisions at a center-of-mass energy of 8 TeV. The gauge bosons are reconstructed using their leptonic decay modes into electrons and muons. The data were collected in 2012 by the ATLAS experiment a ...
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Journal ArticleJournal of High Energy Physics · May 1, 2016
A search for Higgs boson production in association with a pair of top quarks (tt¯ H) is performed, where the Higgs boson decays to bb¯, and both top quarks decay hadronically. The data used correspond to an integrated luminosity of 20.3 fb−1 of ...
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Journal ArticleJournal of Instrumentation · April 29, 2016
The ATLAS (one of two general purpose detectors at the LHC) Transition Radiation Tracker (TRT) is the outermost of the three tracking subsystems of the ATLAS Inner Detector. It is a large straw-based detector and contains about 350,000 electronics channels ...
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Journal ArticlePhysical Review D · April 18, 2016
This article reports on a search for dark matter pair production in association with a Higgs boson decaying to a pair of bottom quarks, using data from 20.3 fb-1 of pp collisions at a center-of-mass energy of 8 TeV collected by the ATLAS detector at the LH ...
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Journal ArticleJournal of Instrumentation · April 4, 2016
The identification of jets containing b hadrons is important for the physics programme of the ATLAS experiment at the Large Hadron Collider. Several algorithms to identify jets containing b hadrons are described, ranging from those based on the reconstruct ...
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Journal ArticleJournal of High Energy Physics · April 1, 2016
Abstract: The electroweak production and subsequent decay of single top quarks is determined by the properties of the Wtb vertex. This vertex can be described by the complex parameters of an effective Lagrangian. An analysis of angular distributions of the ...
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Journal ArticlePhysical review letters · April 2016
ATLAS has measured two-particle correlations as a function of the relative azimuthal angle, Δϕ, and pseudorapidity, Δη, in sqrt[s]=13 and 2.76 TeV pp collisions at the LHC using charged particles measured in the pseudorapidity interval |η|<2.5. The correla ...
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Journal ArticlePhysical review letters · April 2016
We show that by adding a single new scalar particle to the standard model, a TeV-scale leptoquark with the quantum numbers of a right-handed down quark, one can explain in a natural way three of the most striking anomalies of particle physics: the violatio ...
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Journal ArticlePhysical Review C · March 28, 2016
Prompt photon production in sNN=2.76-TeV Pb+Pb collisions has been measured by the ATLAS experiment at the Large Hadron Collider using data collected in 2011 with an integrated luminosity of 0.14 nb-1. Inclusive photon yields, scaled by the mean nuclear th ...
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Journal ArticlePhysical Review D · March 21, 2016
A measurement of vector boson (V) production in conjunction with a D∗(2010)+ meson is presented. Using a data sample corresponding to 9.7 fb-1 of proton-antiproton collisions at center-of-mass energy s=1.96 TeV produced by the Fermilab Tevatron, we reconst ...
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Journal ArticlePhysical Review D · March 18, 2016
A search for highly ionizing particles produced in proton-proton collisions at 8 TeV center-of-mass energy is performed by the ATLAS Collaboration at the CERN Large Hadron Collider. The data set used corresponds to an integrated luminosity of 7.0 fb-1. A c ...
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Journal ArticleJournal of High Energy Physics · March 17, 2016
Charged Higgs bosons heavier than the top quark and decaying via H± → tb are searched for in proton-proton collisions measured with the ATLAS experiment at (Formula presented.) TeV corresponding to an integrated luminosity of 20.3fb−1 ...
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Journal ArticlePhysical review letters · March 2016
The ZZ production cross section in proton-proton collisions at 13 TeV center-of-mass energy is measured using 3.2 fb^{-1} of data recorded with the ATLAS detector at the Large Hadron Collider. The considered Z boson candidates decay to an electron or muon ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
Searches for pair-produced scalar leptoquarks are performed using 20 fb[Formula: see text] of proton-proton collision data provided by the LHC and recorded by the ATLAS detector at [Formula: see text] TeV. Events with two electrons (muons) and two or more ...
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Journal ArticleJournal of High Energy Physics · January 1, 2016
The cross-section for the production of a single top quark in association with a W boson in proton-proton collisions at √s = 8TeV is measured. The dataset corresponds to an integrated luminosity of 20.3 fb−1, collected by the ATLAS detector in 2 ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A search is presented for a high-mass Higgs boson in the [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text] decay modes using the ATLAS detector at the CERN Large Hadron Collider. The search uses proton-proton collision ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
This paper reports a detailed study of techniques for identifying boosted, hadronically decaying W bosons using 20.3 fb[Formula: see text] of proton-proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy [Formula ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
This paper reports inclusive and differential measurements of the [Formula: see text] charge asymmetry [Formula: see text] in [Formula: see text] of [Formula: see text][Formula: see text] collisions recorded by the ATLAS experiment at the Large Hadron Coll ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
Results of a search for new phenomena in events with at least three photons are reported. Data from proton-proton collisions at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 20.3 fb[Formula: see text], were collected with t ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
The centrality dependence of the mean charged-particle multiplicity as a function of pseudorapidity is measured in approximately 1 [Formula: see text]b[Formula: see text] of proton-lead collisions at a nucleon-nucleon centre-of-mass energy of [Formula: see ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
The distribution of particles inside hadronic jets produced in the decay of boosted W and Z bosons can be used to discriminate such jets from the continuum background. Given that a jet has been identified as likely resulting from the hadronic ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A search for strongly produced supersymmetric particles is conducted using signatures involving multiple energetic jets and either two isolated leptons (e or [Formula: see text]) with the same electric charge or at least three isolated leptons. The ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
This article documents the performance of the ATLAS muon identification and reconstruction using the LHC dataset recorded at [Formula: see text] TeV in 2015. Using a large sample of [Formula: see text] and [Formula: see text] decays from 3.2 fb[Formula: se ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
Distributions of transverse momentum [Formula: see text] and the related angular variable [Formula: see text] of Drell–Yan lepton pairs are measured in 20.3 fb[Formula: see text] of proton–proton collisions at [Formula: see text] TeV with the ATLAS d ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
This paper presents a new method of reconstructing the individual charged and neutral hadrons in tau decays with the ATLAS detector. The reconstructed hadrons are used to classify the decay mode and to calculate the visible four-momentum of reconstructed t ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
Event-shape observables measured using charged particles in inclusive Z-boson events are presented, using the electron and muon decay modes of the Z bosons. The measurements are based on an integrated luminosity of [Formula: see text] of prot ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A search for squarks and gluinos in final states containing hadronic jets, missing transverse momentum but no electrons or muons is presented. The data were recorded in 2015 by the ATLAS experiment in [Formula: see text] proton-proton collisions at the Lar ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
This paper presents measurements of distributions of charged particles which are produced in proton-proton collisions at a centre-of-mass energy of [Formula: see text] and recorded by the ATLAS detector at the LHC. A special dataset recorded in 2012 with a ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A search for singly produced vector-like Q quarks, where Q can be either a T quark with charge [Formula: see text] or a Y quark with charge [Formula: see text], is performed in proton-proton collisions recorded with the ATLAS de ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A search has been made for supersymmetry in a final state containing two photons and missing transverse momentum using the ATLAS detector at the Large Hadron Collider. The search makes use of [Formula: see text] of proton-proton collision data collected at ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A study of the decays [Formula: see text] and [Formula: see text] has been performed using data corresponding to an integrated luminosity of 25 fb[Formula: see text] of 7 and 8 TeV proton-proton collisions collected with the ATLAS detector during the LHC R ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
Measurements of distributions of charged particles produced in proton-proton collisions with a centre-of-mass energy of 13 TeV are presented. The data were recorded by the ATLAS detector at the LHC and correspond to an integrated luminosity of 151 [Formula ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
The performance of the jet trigger for the ATLAS detector at the LHC during the 2011 data taking period is described. During 2011 the LHC provided proton-proton collisions with a centre-of-mass energy of 7 TeV and heavy ion collisions with a 2.76 TeV per n ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
This article presents the sensitivity of the ATLAS experiment to the lepton-flavour-violating decays of [Formula: see text]. A method utilising the production of [Formula: see text] leptons via [Formula: see text] decays is used. This method is applied to ...
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Journal ArticleNew Journal of Physics · January 1, 2016
An inclusive search for a new-physics signature of lepton-jet resonances has been performed by the ATLAS experiment. Scalar leptoquarks, pair-produced in pp collisions at s √S13 TeV at the large hadron collider, have been considered. An integrated luminosi ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
The production rates of prompt and non-prompt [Formula: see text] and [Formula: see text] mesons in their dimuon decay modes are measured using 2.1 and 11.4 fb[Formula: see text] of data collected with the ATLAS experiment at the Large Hadron Collider, in ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
The results of a search for gluinos in final states with an isolated electron or muon, multiple jets and large missing transverse momentum using proton-proton collision data at a centre-of-mass energy of [Formula: see text] are presented. The dataset used ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
The result of a search for pair production of the supersymmetric partner of the Standard Model bottom quark ([Formula: see text]) is reported. The search uses 3.2 fb[Formula: see text] of pp collisions at [Formula: see text] TeV collected by the AT ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A search is performed for a heavy particle decaying into different flavour dilepton pairs ([Formula: see text], [Formula: see text] or [Formula: see text]), using 3.2 fb[Formula: see text] of proton-proton collision data at [Formula: see text] TeV collecte ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
Measurements of normalized differential cross-sections of top-quark pair production are presented as a function of the top-quark, [Formula: see text] system and event-level kinematic observables in proton-proton collisions at a centre-of-mass energy of [Fo ...
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Journal ArticleEur Phys J C Part Fields · 2016
A search for neutral Higgs bosons of the minimal supersymmetric standard model (MSSM) and for a heavneutral [Formula: see text] boson is performed using a data sample corresponding to an integrated luminosity of 3.2 fb[Formula: see text] from proton-proton ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
The large rate of multiple simultaneous proton-proton interactions, or pile-up, generated by the Large Hadron Collider in Run 1 required the development of many new techniques to mitigate the adverse effects of these conditions. This paper describes the me ...
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Journal ArticleEur Phys J C Part Fields · 2016
The luminosity determination for the ATLAS detector at the LHC during pp collisions at [Formula: see text] 8 TeV in 2012 is presented. The evaluation of the luminosity scale is performed using several luminometers, and comparisons between these luminosity ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 2016
A measurement of the total pp cross section at the LHC at s=8 TeV is presented. An integrated luminosity of 500 μb−1 was accumulated in a special run with high-β⋆ beam optics to measure the differential elastic cross section as a func ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A test of CP invariance in Higgs boson production via vector-boson fusion using the method of the Optimal Observable is presented. The analysis exploits the decay mode of the Higgs boson into a pair of [Formula: see text] leptons and is based on 20. ...
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Journal ArticleEur Phys J C Part Fields · 2016
The algorithms used by the ATLAS Collaboration to reconstruct and identify prompt photons are described. Measurements of the photon identification efficiencies are reported, using 4.9 fb[Formula: see text] of pp collision data collected at the LHC at [Form ...
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Journal ArticleEur Phys J C Part Fields · 2016
The dijet production cross section for jets containing a b-hadron (b-jets) has been measured in proton-proton collisions with a centre-of-mass energy of [Formula: see text] TeV, using the ATLAS detector at the LHC. The data used correspond to an integrated ...
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Journal ArticleEur Phys J C Part Fields · 2016
A search for supersymmetry in events with large missing transverse momentum, jets, and at least one hadronically decaying tau lepton has been performed using 3.2 fb[Formula: see text] of proton-proton collision data at [Formula: see text] recorded by the A ...
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Journal ArticleEur Phys J C Part Fields · 2016
This paper presents a dedicated search for exotic decays of the Higgs boson to a pair of new spin-zero particles, [Formula: see text], where the particle a decays to b-quarks and has a mass in the range of 20-60 GeV. The search is performed in events where ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · December 22, 2015
A search is presented for pair production of a new heavy quark (Q) that decays into a W boson and a light quark (q) in the final state where one W boson decays leptonically (to an electron or muon plus a neutrino) and the other W boson decays hadronically. ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · December 17, 2015
An observation of the Λb0→ψ(2S)Λ0 decay and a comparison of its branching fraction with that of the Λb0→J/ψΛ0 decay has been made with the ATLAS detector in proton–proton collisions at s=8 ...
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Journal ArticleJournal of High Energy Physics · December 1, 2015
Abstract: A search is performed for narrow resonances decaying into WW, WZ, or ZZ boson pairs using 20.3 fb−1 of proton-proton collision data at a centre-of-mass energy of s=8$$ \sqrt{s}=8 $$ TeV recorded with the ATLAS detector at the Large Had ...
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Journal ArticleJournal of High Energy Physics · December 1, 2015
Abstract: A search for flavour-changing neutral current decays of a top quark to an uptype quark (q = u, c) and the Standard Model Higgs boson, where the Higgs boson decays to(Formula Presented.), is presented. The analysis searches for top quark pair even ...
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Journal ArticleJournal of High Energy Physics · December 1, 2015
Differential cross sections for the production of at least four jets have been measured in proton-proton collisions at (Formula presented.) TeV at the Large Hadron Collider using the ATLAS detector. Events are selected if the four anti-ktR = 0.4 ...
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Journal ArticlePhysical review letters · December 2015
With an integrated luminosity of 2.47 fb(-1) recorded by the ATLAS experiment at the LHC, the exclusive decays B(s)(0)→J/ψϕ and B(d)(0)→J/ψK(*0) of B mesons produced in pp collisions at √s=7 TeV are used to determine the ratio of fragmentation fractions ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 12, 2015
The distribution and orientation of energy inside jets is predicted to be an experimental handle on colour connections between the hard-scatter quarks and gluons initiating the jets. This Letter presents a measurement of the distribution of one such variab ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 12, 2015
High transverse momentum jets produced in pp collisions at a centre of mass energy of 7 TeV are used to measure the transverse energy-energy correlation function and its associated azimuthal asymmetry. The data were recorded with the ATLAS detector at the ...
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Journal ArticlePhysical Review C Nuclear Physics · October 14, 2015
Measurements of differential cross sections for J/ψ production in p + Pb collisions at (√SNN at the CERN Large Hadron Collider with the ATLAS detector are presented. The data set used corresponds to an integrated luminosity of 28.1 nb−1. The J/ψ ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · October 13, 2015
Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. This article presents the results of a search for events containing at least one long-lived particle that decays at a significant distance from its production ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · October 7, 2015
This Letter reports a measurement of the exclusive γγ→ℓ+ℓ− (ℓ=e, μ) cross-section in proton–proton collisions at a centre-of-mass energy of 7 TeV by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb−1
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · October 7, 2015
A search for the associated production of the Higgs boson with a top quark pair is performed in multilepton final states using 20.3 fb−1 of proton–proton collision data recorded by the ATLAS experiment at s=8 TeV at the Large Hadron Collider. Fi ...
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Journal ArticlePhysical review letters · October 2015
We present the final combination of CDF and D0 measurements of cross sections for single-top-quark production in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total integrated luminosities of up to 9.7 fb^{-1} ...
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Journal ArticleJournal of High Energy Physics · October 1, 2015
Abstract: The normalized differential cross section for top-quark pair production in association with at least one jet is studied as a function of the inverse of the invariant mass of the tt¯(Formula presented.) + 1-jet system. This distribution can be use ...
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Journal ArticleJournal of High Energy Physics · October 1, 2015
Abstract: A summary of the constraints from the ATLAS experiment on R-parity-conserving supersymmetry is presented. Results from 22 separate ATLAS searches are considered, each based on analysis of up to 20.3 fb−1 of proton-proton collision data ...
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Journal ArticleJournal of High Energy Physics · October 1, 2015
Abstract: A summary is presented of ATLAS searches for gluinos and first- and second-generation squarks in final states containing jets and missing transverse momentum, with or without leptons or b-jets, in the s=8$$ \sqrt{s}=8 $$ TeV data set collected at ...
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Journal ArticleJournal of High Energy Physics · September 29, 2015
Abstract: It was found that the non-perturbative corrections calculated using Pythia with the Perugia 2011 tune did not include the effect of the underlying event. The affected correction factors were recomputed using the Pythia 6.427 generator. These corr ...
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Journal ArticleJournal of High Energy Physics · September 26, 2015
Charged-particle spectra obtained in Pb+Pb interactions at (Formula presented.) and pp interactions at (Formula presented.) with the ATLAS detector at the LHC are presented, using data with integrated luminosities of 0.15 nb−1 and 4.2 pb−1< ...
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Journal ArticleJournal of High Energy Physics · September 26, 2015
This paper presents measurements from the ATLAS experiment of the forward-backward asymmetry in the reaction pp → Z/γ* → l+l−, with l being electrons or muons, and the extraction of the effective weak mixing angle. The resu ...
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Journal ArticleJournal of High Energy Physics · September 26, 2015
A search for heavy leptons decaying to a Z boson and an electron or a muon is presented. The search is based on pp collision data taken at (Formula presented.) = 8 TeV by the ATLAS experiment at the CERN Large Hadron Collider, corresponding to an integrate ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 2, 2015
Measurements of the centrality and rapidity dependence of inclusive jet production in sNN=5.02 TeV proton–lead (p+Pb) collisions and the jet cross-section in s=2.76 TeV proton–proton collisions are presented. These quantities are measured in dat ...
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Journal ArticlePhysical review letters · September 2015
Results of a search for new phenomena in events with large missing transverse momentum and a Higgs boson decaying to two photons are reported. Data from proton-proton collisions at a center-of-mass energy of 8 TeV and corresponding to an integrated luminos ...
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Journal ArticleJournal of High Energy Physics · August 31, 2015
A search for pair production of vector-like quarks, both up-type (T) and down-type (B), as well as for four-top-quark production, is presented. The search is based on pp collisions at (Formula presented.) TeV recorded in 2012 with the ATLAS detector at the ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · August 18, 2015
We measure the particle-level forward-backward production asymmetry in bb¯ pairs with masses (mbb¯) larger than 150 GeV/c2, using events with hadronic jets and employing jet charge to distinguish b from b¯. The measurement uses 9.5 fb-1 of pp¯ collisions a ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · August 14, 2015
This article describes a search for high-mass resonances decaying to a pair of photons using a sample of 20.3 fb-1 of pp collisions at s=8 TeV recorded with the ATLAS detector at the Large Hadron Collider. The data are found to be in agreement with the Sta ...
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Journal ArticleJournal of High Energy Physics · August 14, 2015
Abstract: A generic search for anomalous production of events with at least three charged leptons is presented. The data sample consists of pp collisions at √s=8 TeV collected in 2012 by the ATLAS experiment at the CERN Large Hadron Collider, and correspon ...
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Journal ArticleJournal of High Energy Physics · August 14, 2015
Abstract: A search for new particles that decay into top quark pairs is reported. The search is performed with the ATLAS experiment at the LHC using an integrated luminosity of 20.3 fb−1 of proton-proton collision data collected at a centre-of-m ...
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Journal ArticleJournal of High Energy Physics · August 14, 2015
Abstract: A search for Higgs boson production in association with a W or Z boson, in the H→ W W∗ decay channel, is performed with a data sample collected with the ATLAS detector at the LHC in proton-proton collisions at centre-of-mass energies √ ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · August 6, 2015
We present a measurement of the top-quark mass in events containing two leptons (electrons or muons) with a large transverse momentum, two or more energetic jets, and a transverse-momentum imbalance. We use the full proton-antiproton collision data set col ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · August 3, 2015
A search for the pair production of heavy leptons (N0,L±) predicted by the type-III seesaw theory formulated to explain the origin of small neutrino masses is presented. The decay channels N0→W±l (=e,μ,τ) and L±→W±ν (ν=νe,νμ,ντ) are considered. The analysi ...
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Journal ArticlePhysical review letters · August 2015
We report on a search for charged massive resonances decaying to top (t) and bottom (b) quarks in the full data set of proton-antiproton collisions at a center-of-mass energy of √[s]=1.96 TeV collected by the CDF II detector at the Tevatron, corresponding ...
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Journal ArticlePhysical review letters · August 2015
Measurements of the total and differential cross sections of Higgs boson production are performed using 20.3 fb^{-1} of pp collisions produced by the Large Hadron Collider at a center-of-mass energy of sqrt[s]=8 TeV and recorded by the ATLAS detector. Cr ...
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Journal ArticleJournal of High Energy Physics · July 23, 2015
A search for evidence of physics beyond the Standard Model in final states with multiple high-transverse-momentum jets is performed using 20.3 fb−1 of proton-proton collision data at (Formula presented.) = 8 TeV recorded by the ATLAS detector at ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · July 17, 2015
A search for the decay of neutral, weakly interacting, long-lived particles using data collected by the ATLAS detector at the LHC is presented. This analysis uses the full data set recorded in 2012: 20.3 fb-1 of proton-proton collision data at s=8 TeV. The ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · July 16, 2015
We report the observation of Higgs boson decays to WW∗based on an excess over background of 6.1 standard deviations in the dilepton final state, where the Standard Model expectation is 5.8 standard deviations. Evidence for the vector-boson fusio ...
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Journal ArticleJournal of High Energy Physics · July 6, 2015
Abstract: A search for high-mass resonances decaying into τ+τ− final states using proton-proton collisions at s=8$$ \sqrt{s}=8 $$ TeV produced by the Large Hadron Collider is presented. The data were recorded with the ATLAS detector a ...
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Journal ArticleJournal of High Energy Physics · July 5, 2015
Abstract: A search for heavy Majorana neutrinos in events containing a pair of high-pT leptons of the same charge and high-pT jets is presented. The search uses 20.3 fb−1 of pp collision data collected with the ATLAS detect ...
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Journal ArticlePhysical review letters · July 2015
This Letter reports evidence of triple gauge boson production pp→W(ℓν)γγ+X, which is accessible for the first time with the 8 TeV LHC data set. The fiducial cross section for this process is measured in a data sample corresponding to an integrated luminosi ...
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Journal ArticlePhysical review letters · July 2015
This Letter presents a search for a heavy neutral particle decaying into an opposite-sign different-flavor dilepton pair, e^{±}μ^{∓}, e^{±}τ^{∓}, or μ^{±}τ^{∓} using 20.3 fb^{-1} of pp collision data at sqrt[s]=8 TeV collected by the ATLAS detector at th ...
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Journal ArticleJournal of High Energy Physics · June 29, 2015
Abstract: Various differential cross-sections are measured in top-quark pair (tt) events produced in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the LHC with the ATLAS detector. These differential cross-sections are presented in a ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · June 24, 2015
A measurement is presented of the (formula presented) inclusive production cross section in pp collisions at a center-of-mass energy of (formula presented) using data collected by the ATLAS detector at the CERN Large Hadron pffiffi Collider. The measuremen ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · June 23, 2015
We present a measurement of the W-boson-pair production cross section in pp¯ collisions at 1.96 TeV center-of-mass energy and the first measurement of the differential cross section as a function of jet multiplicity and leading-jet energy. The W+
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · June 19, 2015
A search has been performed for pair production of heavy vectorlike down-type (B) quarks. The analysis explores the lepton-plus-jets final state, characterized by events with one isolated charged lepton (electron or muon), significant missing transverse mo ...
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Journal ArticlePhysical review letters · June 2015
A search for new phenomena in LHC proton-proton collisions at a center-of-mass energy of sqrt[s]=8 TeV was performed with the ATLAS detector using an integrated luminosity of 17.3 fb^{-1}. The angular distributions are studied in events with at least two j ...
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Journal ArticlePhysical review letters · June 2015
A search for a charged Higgs boson, H(±), decaying to a W(±) boson and a Z boson is presented. The search is based on 20.3 fb(-1) of proton-proton collision data at a center-of-mass energy of 8 TeV recorded with the ATLAS detector at the LHC. The H(±) bos ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · May 29, 2015
We measure exclusive π+π- production in proton-antiproton collisions at center-of-mass energies s=0.9 and 1.96 TeV in the Collider Detector at Fermilab. We select events with two oppositely charged particles, assumed to be pions, with pseudorapidity |η|<1. ...
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Journal ArticleJournal of High Energy Physics · May 22, 2015
A measurement of the top-antitop (tt¯) charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb−1 of LHC pp collisions at a centreof-mass energy of 7 TeV collected by the ATLAS detector. Events with two charge ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · May 11, 2015
A search for a heavy, CP-odd Higgs boson, A, decaying into a Z boson and a 125 GeV Higgs boson, h, with the ATLAS detector at the LHC is presented. The search uses proton–proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integra ...
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Journal ArticlePhysical review letters · May 2015
A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLAS and CMS experiments at the CERN LHC in the H→γγ and H→ZZ→4ℓ decay channels. The results are obtained from a simultaneous fit to the reconstructed invariant m ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · April 28, 2015
A search is performed for top-quark pairs (tt¯) produced together with a photon (γ) with transverse energy greater than 20 GeV using a sample of tt¯ candidate events in final states with jets, missing transverse momentum, and one isolated electron or muon. ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · April 9, 2015
A search for new charged massive gauge bosons, called W′, is performed with the ATLAS detector at the LHC, in proton–proton collisions at a centre-of-mass energy of s=8 TeV, using a dataset corresponding to an integrated luminosity of 20.3 fb
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · April 9, 2015
The ATLAS detector at the Large Hadron Collider at CERN is used to search for the decay of a scalar boson to a pair of long-lived particles, neutral under the Standard Model gauge group, in 20.3fb-1 of data collected in proton-proton collisions at s=8TeV. ...
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Journal ArticlePhysical review letters · April 2015
A search for particles with the same mass and couplings as those of the standard model Higgs boson but different spin and parity quantum numbers is presented. We test two specific alternative Higgs boson hypotheses: a pseudoscalar Higgs boson with spin-par ...
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Journal ArticleJournal of High Energy Physics · April 1, 2015
The results of a search for supersymmetry in final states containing at least one isolated lepton (electron or muon), jets and large missing transverse momentum with the ATLAS detector at the Large Hadron Collider are reported. The search is based on proto ...
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Journal ArticleJournal of High Energy Physics · April 1, 2015
Abstract: Results of a search for H → ττ decays are presented, based on the full set of proton-proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities of 4.5 fb−1 and ...
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Journal ArticlePhysical review letters · April 2015
The results of a dedicated search for pair production of scalar partners of charm quarks are reported. The search is based on an integrated luminosity of 20.3 fb^{-1} of pp collisions at sqrt[s]=8 TeV recorded with the ATLAS detector at the LHC. The sear ...
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Journal ArticlePhysical review letters · April 2015
A measurement of spin correlation in tt[over ¯] production is presented using data collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of ...
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Journal ArticlePhysical review letters · April 2015
Combined constraints from the CDF and D0 Collaborations on models of the Higgs boson with exotic spin J and parity P are presented and compared with results obtained assuming the standard model value JP=0+. Both collaborations analyzed approximately 10 fb ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · March 17, 2015
Production of the Υ(1S) meson in association with a vector boson is a rare process in the standard model with a cross section predicted to be below the sensitivity of the Tevatron. Observation of this process could signify contributions not described by th ...
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Journal ArticleJournal of High Energy Physics · March 17, 2015
Abstract: The results of a search for charged Higgs bosons decaying to a τ lepton and a neutrino, H± → τ±ν, are presented. The analysis is based on 19.5 fb−1 of proton-proton collision data at s$$ \sqrt{s} $$ = 8 TeV collec ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · March 9, 2015
Dijet events produced in LHC proton-proton collisions at a center-of-mass energy s=8 TeV are studied with the ATLAS detector using the full 2012 data set, with an integrated luminosity of 20.3 fb-1. Dijet masses up to about 4.5 TeV are probed. No resonance ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · March 6, 2015
Simultaneous measurements of the tt¯, W+W-, and Z/γ∗→ττ production cross-sections using an integrated luminosity of 4.6 fb-1 of pp collisions at √s=7 TeV collected by the ATLAS detector at the LHC are presented. Events are selected with two high transverse ...
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Journal ArticlePhysical review letters · March 2015
A search for the decays of the Higgs and Z bosons to J/ψγ and ϒ(nS)γ (n=1,2,3) is performed with pp collision data samples corresponding to integrated luminosities of up to 20.3 fb^{-1} collected at sqrt[s]=8 TeV with the ATLAS detector at the CERN Large ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · February 19, 2015
Results of a study of the substructure of the highest transverse momentum (pT) jets observed by the CDF Collaboration are presented. Events containing at least one jet with pT>400GeV/c in a sample corresponding to an integrated luminosity of 5.95fb-1, coll ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · February 9, 2015
The transverse polarization of Λ and Λ¯ hyperons produced in proton-proton collisions at a center-of-mass energy of 7 TeV is measured. The analysis uses 760 μb-1 of minimum bias data collected by the ATLAS detector at the LHC in the year 2010. The measured ...
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Journal ArticlePhysical review letters · February 2015
Measurements of inclusive jet production are performed in pp and Pb+Pb collisions at √(s)NN=2.76 TeV with the ATLAS detector at the LHC, corresponding to integrated luminosities of 4.0 and 0.14 nb(-1), respectively. The jets are identified with the anti- ...
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Journal ArticlePhysical review letters · February 2015
Searches are performed for resonant and nonresonant Higgs boson pair production in the γγbb[over ¯] final state using 20 fb^{-1} of proton-proton collisions at a center-of-mass energy of 8 TeV recorded with the ATLAS detector at the CERN Large Hadron Coll ...
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Journal ArticleJournal of High Energy Physics · February 1, 2015
Abstract: The inclusive jet cross-section is measured in proton-proton collisions at a centre-of-mass energy of 7 TeV using a data set corresponding to an integrated luminosity of 4.5 fb−1 collected with the ATLAS detector at the Large Hadron Co ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 27, 2015
Results of a search for new phenomena in events with an energetic photon and large missing transverse momentum with the ATLAS experiment at the LHC are reported. Data were collected in proton-proton collisions at a center-of-mass energy of 8 TeV and corres ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 16, 2015
The final ATLAS Run 1 measurements of Higgs boson production and couplings in the decay channel H → ZZ∗ → l+l-l'+l'-, where l, l' = e or μ, are presented. These measurements were performed using pp collision data ...
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Journal ArticleJournal of High Energy Physics · January 14, 2015
Abstract: Searches for heavy long-lived charged particles are performed using a data sample of 19.1 fb−1 from proton-proton collisions at a centre-of-mass energy of s=8$$ \sqrt{s}=8 $$ TeV collected by the ATLAS detector at the Large Hadron Coll ...
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Journal ArticleJournal of High Energy Physics · January 8, 2015
Abstract: The tt¯$$ t\overline{t} $$ production cross-section dependence on jet multiplicity and jet transverse momentum is reported for proton-proton collisions at a centre-of-mass energy of 7 TeV in the single-lepton channel. The data were collected with ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 6, 2015
Differential cross sections for the production of Z bosons or off-shell photons γ∗ in association with jets are measured in proton-antiproton collisions at center-of-mass energy s=1.96TeV using the full data set collected with the Collider Detector at Ferm ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 5, 2015
This Letter presents a search at the LHC for s-channel single top-quark production in proton-proton collisions at a centre-of-mass energy of 8 TeV. The analyzed data set was recorded by the ATLAS detector and corresponds to an integrated luminosity of 20.3 ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 5, 2015
This Letter presents a search for a hidden-beauty counterpart of the X(3872) in the mass ranges of 10.05–10.31 GeV and 10.40–11.00 GeV, in the channel Xb→π+π−ϒ(1S)(→μ+μ−), using 16.2 fb−1 of ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 5, 2015
A search is performed for Higgs bosons produced in association with top quarks using the diphoton decay mode of the Higgs boson. Selection requirements are optimized separately for leptonic and fully hadronic final states from the top quark decays. The dat ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
The jet energy scale (JES) and its systematic uncertainty are determined for jets measured with the ATLAS detector using proton-proton collision data with a centre-of-mass energy of [Formula: see text] TeV corresponding to an integrated luminosity of [Form ...
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Journal ArticleJournal of High Energy Physics · January 1, 2015
Abstract: A search for the (Formula presented.) decay of the Standard Model Higgs boson is performed with the ATLAS experiment using the full dataset recorded at the LHC in Run 1. The integrated luminosities used are 4.7 and 20.3 fb−1 from pp co ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
A measurement of [Formula: see text] boson production in lead-lead collisions at [Formula: see text] is presented. It is based on the analysis of data collected with the ATLAS detector at the LHC in 2011 corresponding to an integrated luminosity of 0.14 [F ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
The performance of the ATLAS muon trigger system is evaluated with proton-proton collision data collected in 2012 at the Large Hadron Collider at a centre-of-mass energy of 8 TeV. It is primarily evaluated using events containing a pair of muons from the d ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
This article reports on a search for dark matter pair production in association with bottom or top quarks in [Formula: see text] of [Formula: see text] collisions collected at [Formula: see text] TeV by the ATLAS detector at the LHC. Events with large miss ...
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Journal ArticleJournal of High Energy Physics · January 1, 2015
Abstract: A low-background inclusive search for new physics in events with same-sign dileptons is presented. The search uses proton-proton collisions corresponding to 20.3 fb−1 of integrated luminosity taken in 2012 at a centre-of-mass energy of ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
This paper presents cross sections for the production of a [Formula: see text] boson in association with jets, measured in proton-proton collisions at [Formula: see text] with the ATLAS experiment at the large hadron collider. With an integrated luminosity ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
A search for the production of single-top-quarks in association with missing energy is performed in proton-proton collisions at a centre-of-mass energy of [Formula: see text] with the ATLAS experiment at the large hadron collider using data collected in 20 ...
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Journal ArticleJournal of High Energy Physics · January 1, 2015
Abstract: The production of a W boson decaying to eν or μν in association with a W or Z boson decaying to two jets is studied using 4.6 fb−1 of proton-proton collision data at √s =7 TeV recorded with the ATLAS detector at the LHC. The combined W ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
A search is presented for narrow diboson resonances decaying to [Formula: see text] or [Formula: see text] in the final state where one [Formula: see text] boson decays leptonically (to an electron or a muon plus a neutrino) and the other [Formula: see tex ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
A search is presented for the direct pair production of a chargino and a neutralino [Formula: see text], where the chargino decays to the lightest neutralino and the [Formula: see text] boson, [Formula: see text], while the neutralino decays to the lightes ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
A search for a massive [Formula: see text] gauge boson decaying to a top quark and a bottom quark is performed with the ATLAS detector in [Formula: see text] collisions at the LHC. The dataset was taken at a centre-of-mass energy of [Formula: see text] and ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
Studies of the spin and parity quantum numbers of the Higgs boson in the [Formula: see text] final state are presented, based on proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider, corresponding to an integrated lumin ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
Double-differential three-jet production cross-sections are measured in proton-proton collisions at a centre-of-mass energy of [Formula: see text] using the ATLAS detector at the large hadron collider. The measurements are presented as a function of the th ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
The production of a [Formula: see text] boson in association with a [Formula: see text] meson in proton-proton collisions probes the production mechanisms of quarkonium and heavy flavour in association with vector bosons, and allows studies of multiple par ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
The mass of the top quark is measured in a data set corresponding to 4.6 [Formula: see text] of proton-proton collisions with centre-of-mass energy [Formula: see text] TeV collected by the ATLAS detector at the LHC. Events consistent with hadronic decays o ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
A search for a new resonance decaying to a W or Z boson and a Higgs boson in the [Formula: see text] final states is performed using 20.3 fb[Formula: see text] of pp collision data recorded at [Formula: see text] 8 TeV with the ATLAS d ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2015
Results of a search for decays of massive particles to fully hadronic final states are presented. This search uses 20.3 fb-1 of data collected by the ATLAS detector in s=8 TeV proton-proton collisions at the LHC. Signatures based on high jet multiplicities ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
Two searches for supersymmetric particles in final states containing a same-flavour opposite-sign lepton pair, jets and large missing transverse momentum are presented. The proton-proton collision data used in these searches were collected at a centre-of-m ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb[Formula: see text] of [Formula: see text] TeV data collected in 2012 with the ATLAS detector at the LHC. ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
This paper describes the trigger and offline reconstruction, identification and energy calibration algorithms for hadronic decays of tau leptons employed for the data collected from pp collisions in 2012 with the ATLAS detector at the LHC center-of- ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
Measurements of the ZZ and WW final states in the mass range above the [Formula: see text] and [Formula: see text] thresholds provide a unique opportunity to measure the off-shell coupling strength of the Higgs boson. This paper presents cons ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
A search for Higgs boson decays to invisible particles is performed using 20.3 [Formula: see text] of pp collision data at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. The process considered is Higgs ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
A search for the Standard Model Higgs boson produced in association with a top-quark pair, [Formula: see text], is presented. The analysis uses 20.3 fb-1 of pp collision data at [Formula: see text], collected with the ATLAS detector at th ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
A search for heavy long-lived multi-charged particles is performed using the ATLAS detector at the LHC. Data collected in 2012 at [Formula: see text] TeV from pp collisions corresponding to an integrated luminosity of 20.3 fb[Formula: see text]are e ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2015
A search for the decay to a pair of new particles of either the 125 GeV Higgs boson (h) or a second charge parity (CP)-even Higgs boson (H) is presented. The data set corresponds to an integrated luminosity of 20.3 fb-1 of pp collisions at √s = ...
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Journal ArticlePhysical Review C Nuclear Physics · January 1, 2015
Correlations between the elliptic or triangular flow coefficients vm (m = 2 or 3) and other flow harmonics vn (n = 2 to 5) are measured using √sNN = 2.76 TeV Pb + Pb collision data collected in 2010 by the ATLAS experiment ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2015
A search is presented for photonic signatures motivated by generalized models of gauge-mediated supersymmetry breaking. This search makes use of 20.3 fb-1 of proton-proton collision data at √s = 8 TeV recorded by the ATLAS detector at the LHC, a ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
A search for Higgs boson pair production [Formula: see text] is performed with 19.5 fb[Formula: see text] of proton-proton collision data at [Formula: see text] TeV, which were recorded by the ATLAS detector at the Large Hadron Collider in 2012. The decay ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2015
Many extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as R-hadrons or charginos. These particles, if produced at the Large Hadron Collider, should be moving non-relativistically and are therefore ide ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2015
Measurements of the branching ratios of top quark decays into leptons and jets using events with tt (top antitop) pairs are reported. Events were recorded with the ATLAS detector at the LHC in pp collisions at a center-of-mass energy of 7 TeV. The collecte ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · December 30, 2014
We report a measurement of the indirect CP-violating asymmetries (AΓ) between effective lifetimes of anticharm and charm mesons reconstructed in D0→K+K- and D0→π+π- decays. We use the full data set of proton-antiproton collisions collected by the Collider ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · December 24, 2014
Measurements of spin correlation in top quark pair production are presented using data collected with the ATLAS detector at the LHC with proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 4.6 fb-1. Ev ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · December 24, 2014
A measurement of the production processes of the recently discovered Higgs boson is performed in the two-photon final state using 4.5 fb-1of proton-proton collisions data at √s = 7 TeV and 20.3 fb-1at √s = 8 TeV collected by the ATLAS ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · December 12, 2014
Measurements of charged-particle fragmentation functions of jets produced in ultra-relativistic nuclear collisions can provide insight into the modification of parton showers in the hot, dense medium created in the collisions. ATLAS has measured jets in s< ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · December 11, 2014
This article presents measurements of the t-channel single top-quark (t) and top-antiquark (t¯) total production cross sections σ(tq) and σ(t¯q), their ratio Rt=σ(tq)/σ(t¯q), and a measurement of the inclusive production cross section σ(tq+t¯q) in proton-p ...
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Journal ArticlePhysical review letters · December 2014
We report a measurement of single top quark production in proton-antiproton collisions at a center-of-mass energy of sqrt[s]=1.96 TeV using a data set corresponding to 7.5 fb(-1) of integrated luminosity collected by the Collider Detector at Fermilab. We ...
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Journal ArticleNuclear Physics B · December 1, 2014
A measurement of the total pp cross section at the LHC at s=7 TeV is presented. In a special run with high-β⋆ beam optics, an integrated luminosity of 80 μb−1 was accumulated in order to measure the differential elastic cross section ...
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Journal ArticleJournal of High Energy Physics · November 19, 2014
Abstract: A search is presented for the production of new heavy quarks that decay to a Z boson and a third-generation Standard Model quark. In the case of a new charge +2/3 quark (T ), the decay targeted is T → Zt, while the decay targeted for a new charge ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · November 18, 2014
The top-quark mass Mtop is measured using top quark-antiquark pairs produced in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV and that decay into a fully hadronic final state. The full data set collected with the CDF II detector at th ...
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Journal ArticleJournal of High Energy Physics · November 11, 2014
Abstract: A search for the neutral Higgs bosons predicted by the Minimal Supersymmetric Standard Model (MSSM) is reported. The analysis is performed on data from proton-proton collisions at a centre-of-mass energy of 8 TeV collected with the ATLAS detector ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 10, 2014
This letter presents a search for new resonances decaying to final states with a vector boson produced in association with a high transverse momentum photon, Vγ with V=W(→ℓν) or Z(→ℓ+ℓ−), where ℓ=e or μ. The measurements use 20.3 fb
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 10, 2014
This Letter reports the observation of a high transverse momentum Z→bb¯ signal in proton–proton collisions at s=8 TeV and the measurement of its production cross section. The data analysed were collected in 2012 with the ATLAS detector at the LHC and corre ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · November 10, 2014
A search is reported for Higgs boson decay to μ+μ− using data with an integrated luminosity of 24.8 fb−1collected with the ATLAS detector in pp collisions at s=7and8 TeV at the CERN Large Hadron Collider. The observed dimuo ...
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Journal ArticleNew Journal of Physics · November 4, 2014
This paper presents a measurement of the cross-section for high transverse momentum W and Z bosons produced in pp collisions and decaying to all-hadronic final states. The data used in the analysis were recorded by the ATLAS detector at the CERN Large Hadr ...
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Journal ArticlePhysical review letters · November 2014
A search for excited states of the Bc(±) meson is performed using 4.9 fb(-1) of 7 TeV and 19.2 fb(-1) of 8 TeV pp collision data collected by the ATLAS experiment at the LHC. A new state is observed through its hadronic transition to the ground state, wi ...
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Journal ArticleJournal of High Energy Physics · November 1, 2014
The results of a search for top squark (stop) pair production in final states with one isolated lepton, jets, and missing transverse momentum are reported. The analysis is performed with proton-proton collision data at (Formula presented.) = 8 TeV collecte ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · October 23, 2014
The ATLAS detector at the Large Hadron Collider is used to search for the lepton flavor violating process Z → eμ in pp collisions using 20.3 fb-1 of data collected at √s = 8 TeV. An enhancement in the eμ invariant mass spectrum is searched for a ...
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Journal ArticleEuropean Physical Journal C · October 21, 2014
This paper presents the electron and photon energy calibration achieved with the ATLAS detector using about 25 fb-1 of LHC proton–proton collision data taken at centre-of-mass energies of (Equation Present) and 8 TeV. The reconstruction of electron and pho ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · October 13, 2014
Measurements of normalized differential cross sections for top-quark pair production are presented as a function of the top-quark transverse momentum, and of the mass, transverse momentum, and rapidity of the t¯t system, in proton-proton collisions at a ce ...
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Journal ArticlePhysical Review C Nuclear Physics · October 9, 2014
Measurements of two-particle correlation functions and the first five azimuthal harmonics, v1 to v5, are presented, using 28 nb-1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV measured with ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · October 7, 2014
A search for resonant WZ production in the ℓνℓ'ℓ' (ℓ,ℓ'=e,μ) decay channel using 20.3 fb-1 of s=8TeV pp collision data collected by the ATLAS experiment at LHC is presented. No significant deviation from the Standard Model prediction is observed ...
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Journal ArticlePhysical review letters · October 2014
This Letter presents the first study of W(±)W(±)jj, same-electric-charge diboson production in association with two jets, using 20.3 fb(-1) of proton-proton collision data at sqrt[s] = 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Eve ...
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Journal ArticlePhysical review letters · October 2014
A search for scalar particles decaying via narrow resonances into two photons in the mass range 65-600 GeV is performed using 20.3 fb(-1) of √s 8 TeV pp collision data collected with the ATLAS detector at the Large Hadron Collider. The recently discovered ...
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Journal ArticleJournal of High Energy Physics · October 1, 2014
Abstract: Measurements of differential production cross-sections of a Z boson in association with b-jets in pp collisions at √ = 7 TeV are reported. The data analysed correspond to an integrated luminosity of 4.6 fb−1 recorded with the ATLAS det ...
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Journal ArticleJournal of High Energy Physics · September 30, 2014
A search for squarks and gluinos in final states containing high-pTjets, missing transverse momentum and no electrons or muons is presented. The data were recorded in 2012 by the ATLAS experiment in √s = 8TeV proton-proton collisions at the Larg ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · September 24, 2014
Results of a search for supersymmetry via direct production of third-generation squarks are reported, using 20.3fb-1 of proton-proton collision data at s=8TeV recorded by the ATLAS experiment at the LHC in 2012. Two different analysis strategies based on m ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · September 23, 2014
A measurement of the Bs0→J/ψφ decay parameters, updated to include flavor tagging is reported using 4.9fb-1 of integrated luminosity collected by the ATLAS detector from s=7TeV pp collisions recorded in 2011 at the LHC. The values measured for the physical ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · September 19, 2014
The ATLAS detector at the Large Hadron Collider is used to search for high-mass resonances decaying to dielectron or dimuon final states. Results are presented from an analysis of proton-proton (pp) collisions at a center-of-mass energy of 8 TeV correspond ...
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Journal ArticleJournal of High Energy Physics · September 19, 2014
Measurements of fiducial and differential cross sections are presented for Higgs boson production in proton-proton collisions at a centre-of-mass energy of √s = 8TeV. The analysis is performed in the H → γγ decay channel using 20.3 fb−1 of data ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · September 9, 2014
An improved measurement of the mass of the Higgs boson is derived from a combined fit to the reconstructed invariant mass spectra of the decay channels H → γγ and H → ZZ∗→ 4ℓ. The analysis uses the pp collision data sample recorded by the ATLAS ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · September 4, 2014
Results from a search for supersymmetry in events with four or more leptons including electrons, muons and taus are presented. The analysis uses a data sample corresponding to 20.3 fb-1 of proton-proton collisions delivered by the Large Hadron Collider at ...
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Journal ArticleJournal of High Energy Physics · September 1, 2014
The results of a search for direct pair production of the scalar partner to the top quark using an integrated luminosity of 20.1 fb-1 of proton-proton collision data at yfs = 8 TeV recorded with the ATLAS detector at the LHC are reported. The to ...
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Journal ArticleJournal of High Energy Physics · September 1, 2014
This paper presents a search for new particles in events with one lepton (electron or muon) and missing transverse momentum using 20.3 fb−1 of proton-proton collision data at √s = 8 TeV recorded by the ATLAS experiment at the Large Hadron Collid ...
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Journal ArticleJournal of Instrumentation · September 1, 2014
A novel technique to identify and split clusters created by multiple charged particles in the ATLAS pixel detector using a set of artificial neural networks is presented. Such merged clusters are a common feature of tracks originating from highly energetic ...
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Journal ArticleJournal of High Energy Physics · September 1, 2014
This paper describes a measurement of the Z/γ* boson transverse momentum spectrum using ATLAS proton-proton collision data at a centre-of-mass energy of (Formula presented) TeV at the LHC. The measurement is performed in the Z/γ* → e< ...
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Journal ArticlePhysical Review C Nuclear Physics · August 12, 2014
A measurement of event-plane correlations involving two or three event planes of different order is presented as a function of centrality for 7 μb-1 Pb+Pb collision data at sNN=2.76 TeV, recorded by the ATLAS experiment at the Large Hadron Collider. Fourte ...
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Journal ArticleEuropean Physical Journal C · August 1, 2014
Distributions sensitive to the underlying event in QCD jet events have been measured with the ATLAS detector at the LHC, based on (Formula presented.) of proton–proton collision data collected at a centre-of-mass energy of 7 (Formula presented.). Charged-p ...
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Journal ArticleJournal of High Energy Physics · July 30, 2014
The prompt and non-prompt production cross-sections for the χc1 and χc2 charmonium states are measured in pp collisions at √s = 7TeV with the ATLAS detector at the LHC using 4.5 fb−1 of integrated luminosity. The χc states are reconstructed through the rad ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · July 28, 2014
Using the full CDF Run II data sample, we report evidence for a new resonance, which we refer to as B(5970), found simultaneously in the B0π+ and B+π- mass distributions with a significance of 4.4 standard deviations. We further report the first study of r ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · July 23, 2014
We perform a search for new physics using final states consisting of three leptons and a large imbalance in transverse momentum resulting from proton-antiproton collisions at 1.96 TeV center-of-mass energy. We use data corresponding to 5.8fb-1 of integrate ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · July 10, 2014
A search is presented for production of dark-matter particles recoiling against a leptonically decaying Z boson in 20.3fb-1 of pp collisions at s=8TeV with the ATLAS detector at the Large Hadron Collider. Events with large missing transverse momentum and t ...
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Journal ArticlePhysical review letters · July 2014
We measure the inclusive forward-backward asymmetry of the charged-lepton pseudorapidities from top-quark pairs produced in proton-antiproton collisions and decaying to final states that contain two charged leptons (electrons or muons). The data are collec ...
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Journal ArticleJournal of Instrumentation · July 1, 2014
The liquid argon calorimeter is a key component of the ATLAS detector installed at the CERN Large Hadron Collider. The primary purpose of this calorimeter is the measurement of electron and photon kinematic properties. It also provides a crucial input for ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · June 3, 2014
We present a measurement of the ZZ-boson pair-production cross section in 1.96 TeV center-of-mass energy pp̄ collisions. We reconstruct final states incorporating four charged leptons or two charged leptons and two neutrinos from the full data set collected ...
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Journal ArticlePhysical review letters · June 2014
We report evidence for s-channel single-top-quark production in proton-antiproton collisions at center-of-mass energy sqrt[s] = 1.96 TeV using a data set that corresponds to an integrated luminosity of 9.4 fb(-1) collected by the Collider Detector at Fermi ...
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Journal ArticlePhysical review letters · June 2014
The first search for single-top-quark production from the exchange of an s-channel virtual W boson using events with an imbalance in the total transverse energy, b-tagged jets, and no identified leptons is presented. Assuming the electroweak production of ...
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Journal ArticlePhysical review letters · June 2014
We present a measurement of the ratio of the top-quark branching fractions R=B(t→Wb)/B(t→Wq), where q represents any quark flavor, in events with two charged leptons, imbalance in total transverse energy, and at least two jets. The measurement uses proton- ...
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Journal ArticlePhysical review letters · June 2014
We report the first observation of single-top-quark production in the s channel through the combination of the CDF and D0 measurements of the cross section in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total ...
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Journal ArticlePhysical review letters · June 2014
Measurements of four-lepton (4ℓ, ℓ=e,μ) production cross sections at the Z resonance in pp collisions at the LHC with the ATLAS detector are presented. For dilepton and four-lepton invariant mass regions m(ℓ+ℓ(-)) > 5 GeV and 80
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · May 27, 2014
A measurement of the parity-violating decay asymmetry parameter, αb, and the helicity amplitudes for the decay Λb0→J/ψ(μ+μ-)Λ0(pπ-) is reported. The analysis is based on 1400 Λb0 and Λ¯b0 baryons selected in 4.6 fb-1 of proton-proton collision data with a ...
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Journal ArticlePhysical Review Letters · May 20, 2014
A search for evidence of invisible-particle decay modes of a Higgs boson produced in association with a Z boson at the Large Hadron Collider is presented. No deviation from the standard model expectation is observed in 4.5 fb-1 (20.3 fb-1
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Journal ArticleJournal of High Energy Physics · May 16, 2014
Searches for the electroweak production of charginos, neutralinos and sleptons in final states characterized by the presence of two leptons (electrons and muons) and missing transverse momentum are performed using 20.3 fb-1of proton-proton colli ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · May 13, 2014
We present an analysis of top-antitop quark production and decay into a tau lepton, tau neutrino, and bottom quark using data from 9fb-1 of integrated luminosity at the Collider Detector at Fermilab. Dilepton events, where one lepton is an energetic electr ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · May 5, 2014
We report on a study of the dijet invariant-mass distribution in events with one identified lepton, a significant imbalance in the total event transverse momentum, and two jets. This distribution is sensitive to the possible production of a new particle in ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · May 1, 2014
A search is reported for a neutral Higgs boson in the decay channel H→Zγ, Z→ℓ +ℓ -(ℓ = e, μ), using 4.5 fb-1of pp collisions at s=7 TeV and 20.3 fb-1of pp collisions at s=8 TeV, recorded by the ATLAS detector at the CERN La ...
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Journal ArticleJournal of High Energy Physics · May 1, 2014
The production of a W boson in association with a single charm quark is studied using 4.6 fb-1 of pp collision data at √s = 7TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron o ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · April 22, 2014
We report on mass and lifetime measurements of several ground state charmed and bottom baryons, using a data sample corresponding to 9.6fb-1 from pp̄ collisions at s=1.96TeV and recorded with the Collider Detector at Fermilab. Baryon candidates are reconstr ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · April 21, 2014
Using a sample of dilepton top-quark pair (tt̄) candidate events, a study is performed of the production of top-quark pairs together with heavy-flavor (HF) quarks, the sum of tt̄+b+X and tt̄+c+X, collectively referred to as tt̄+HF. The data set used correspond ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · April 4, 2014
Drell-Yan lepton pairs are produced in the process pp̄→μ+μ- +X through an intermediate γ*/Zboson. The forward-backward asymmetry in the polar-angle distribution of the μ- as a function of the invariant mass of the μ+μ- pair is used to obtain the effective l ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · April 3, 2014
We present a measurement of the W-boson mass, MW, using data corresponding to 2.2fb-1 of integrated luminosity collected in pp̄ collisions at s=1.96TeV with the CDF II detector at the Fermilab Tevatron. The selected sample of 470126 W→eν candidates and 6247 ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · April 1, 2014
We combine six measurements of the inclusive top-quark pair (tt̄) production cross section (σtt̄) from data collected with the CDF and D0 detectors at the Fermilab Tevatron with proton-antiproton collisions at s=1.96TeV. The data correspond to integrated lum ...
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Journal ArticleJournal of High Energy Physics · April 1, 2014
The process pp → W±J/ψ provides a powerful probe of the production mechanism of charmonium in hadronic collisions, and is also sensitive to multiple parton interactions in the colliding protons. Using the 2011 ATLAS dataset of 4.5 fb-1 of p s = 7TeV pp col ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · March 24, 2014
A measurement of the cross section for the production of isolated prompt photons in pp collisions at a center-of-mass energy √s=7 TeV is presented. The results are based on an integrated luminosity of 4.6 fb-1 collected with the ATLAS detector at the LHC. ...
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Journal ArticlePhysical review letters · March 2014
This Letter presents a search for quantum black-hole production using 20.3 fb-1 of data collected with the ATLAS detector in pp collisions at the LHC at √s = 8 TeV. The quantum black holes are assumed to decay into a final state characterized by a lepton ( ...
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Journal ArticlePhysical review letters · March 2014
A search for forbidden and exotic Z boson decays in the diphoton mass spectrum is presented for the first time in hadron collisions, based on data corresponding to 10.0 fb(-1) of integrated luminosity from proton-antiproton collisions at √s = 1.96 TeV coll ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · February 19, 2014
A search is presented for new particles in an extension to the Standard Model that includes a heavy Higgs boson (H0), an intermediate charged Higgs-boson pair (H-), and a light Higgs boson (h0). The analysis searches for ev ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 20, 2014
A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb−1 data sample of proton–proton collisions at s=7 TeV recorded with the ATLAS detector at the LHC, events consistent with tt¯ production and decay into ...
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Journal ArticlePhysical review letters · January 2014
A search is presented for dark matter pair production in association with a W or Z boson in pp collisions representing 20.3 fb(-1) of integrated luminosity at √s=8 TeV using data recorded with the ATLAS detector at the Large Hadron Collider. Events with ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 2014
This Letter describes a model-independent search for the production of new resonances in photon + jet (γ + jet) events using 20 fb-1 of proton-proton LHC data recorded with the ATLAS detector at a centre-of-mass energy of √s = 8 TeV. The γ + jet ...
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Journal ArticleJournal of High Energy Physics · January 1, 2014
This paper presents a measurement of the top quark pair (tt̄) production charge asymmetry AC using 4.7 fb-1 of proton-proton collisions at a centre-of-mass energy √s = 7TeV collected by the ATLAS detector at the LHC. A tt̄-enriched sample of event ...
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Journal ArticleJournal of Instrumentation · January 1, 2014
A dedicated reconstruction algorithm to find decay vertices in the ATLAS muon spectrometer is presented. The algorithm searches the region just upstream of or inside the muon spectrometer volume for multi-particle vertices that originate from the decay of ...
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Journal ArticleJournal of High Energy Physics · January 1, 2014
A search for the direct production of charginos and neutralinos in final states with three leptons and missing transverse momentum is presented. The analysis is based on 20.3 fb-1 of vs = 8TeV proton-proton collision data delivered by the Large ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the [Formula: see text] boson mass, jets tagged as originating from [Formula: ...
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Journal ArticleJournal of High Energy Physics · January 1, 2014
Double-differential dijet cross-sections measured in pp collisions at the LHC with a 7TeV centre-of-mass energy are presented as functions of dijet mass and half the rapidity separation of the two highest-pT jets. These measurements are obtained using data ...
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Journal ArticleJournal of High Energy Physics · January 1, 2014
A search is presented for direct top-squark pair production in final states with two leptons (electrons or muons) of opposite charge using 20.3 fb -1 of pp collision data at √s = 8 TeV, collected by the ATLAS experiment at the Large Hadron Colli ...
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Journal ArticleJournal of High Energy Physics · January 1, 2014
A search for strongly produced supersymmetric particles is conducted using signatures involving multiple energetic jets and either two isolated leptons (e or μ) with the same electric charge, or at least three isolated leptons. The search also utilises jet ...
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Journal ArticleJournal of High Energy Physics · January 1, 2014
A search is performed for flavour-changing neutral currents in the decay of a top quark to an up-type (c, u) quark and a Higgs boson, where the Higgs boson decays to two photons. The proton-proton collision data set used corresponds to 4.7 fb-1 ...
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Journal ArticleJournal of High Energy Physics · January 1, 2014
The differential cross section for the process Z/γ * → ℓℓ (ℓ = e, μ) as a function of dilepton invariant mass is measured in pp collisions at √s = 7 TeV at the LHC using the ATLAS detector. The measurement is performed in the e and μ channels for invariant ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
A measurement is presented of the [Formula: see text] production cross section at [Formula: see text] = 7 TeV using [Formula: see text] collision data corresponding to an integrated luminosity of 383 [Formula: see text], collected with the ATLAS experiment ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
Many of the interesting physics processes to be measured at the LHC have a signature involving one or more isolated electrons. The electron reconstruction and identification efficiencies of the ATLAS detector at the LHC have been evaluated using proton-pro ...
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Journal ArticleJournal of High Energy Physics · January 1, 2014
A search for an excess of events with multiple high transverse momentum objects including charged leptons and jets is presented, using 20.3 fb -1 of proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider in 2012 ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
The integrated elliptic flow of charged particles produced in Pb+Pb collisions at [Formula: see text] TeV has been measured with the ATLAS detector using data collected at the Large Hadron Collider. The anisotropy parameter, [Formula: see text], was measur ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
A likelihood-based discriminant for the identification of quark- and gluon-initiated jets is built and validated using 4.7 fb[Formula: see text] of proton-proton collision data at [Formula: see text] [Formula: see text] collected with the ATLAS detector at ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
This paper presents a study of the performance of the muon reconstruction in the analysis of proton-proton collisions at [Formula: see text] TeV at the LHC, recorded by the ATLAS detector in 2010. This performance is described in terms of reconstruction an ...
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Journal ArticleJournal of Instrumentation · January 1, 2014
The semiconductor tracker is a silicon microstrip detector forming part of the inner tracking system of the ATLAS experiment at the LHC. The operation and performance of the semiconductor tracker during the first years of LHC running are described. More th ...
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Journal ArticleJournal of High Energy Physics · January 1, 2014
Abstract: Several models of physics beyond the Standard Model predict neutral particles that decay into final states consisting of collimated jets of light leptons and hadrons (so-called “lepton jets”). These particles can also be long-lived with decay len ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 2014
Measurements of fiducial and differential cross sections of Higgs boson production in the H→ZZ*→4ℓ decay channel are presented. The cross sections are determined within a fiducial phase space and corrected for detection efficiency and resolution effects. T ...
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Journal ArticleSocial Psychiatry and Psychiatric Epidemiology · 2014
A search for supersymmetry (SUSY) in events with large missing transverse momentum, jets, at least one hadronically decaying tau lepton and zero or one additional light leptons (electron/muon), has been performed using 20.3fb−1of proton-proton collision da ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
A measurement of charged-particle distributions sensitive to the properties of the underlying event is presented for an inclusive sample of events containing a [Formula: see text]-boson, decaying to an electron or muon pair. The measurement is based on dat ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
Additional jet activity in dijet events is measured using [Formula: see text] collisions at ATLAS at a centre-of-mass energy of [Formula: see text], for jets reconstructed using the [Formula: see text] algorithm with radius parameter [Formula: see text]. T ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
This paper presents the performance of the ATLAS muon reconstruction during the LHC run with [Formula: see text] collisions at [Formula: see text]-8 TeV in 2011-2012, focusing mainly on data collected in 2012. Measurements of the reconstruction efficiency ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
The ratio of the production cross sections for [Formula: see text] and [Formula: see text] bosons in association with jets has been measured in proton-proton collisions at [Formula: see text] with the ATLAS experiment at the Large Hadron Collider. The meas ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
A search is conducted for non-resonant new phenomena in dielectron and dimuon final states, originating from either contact interactions or large extra spatial dimensions. The LHC 2012 proton-proton collision dataset recorded by the ATLAS detector is used, ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
ATLAS measurements of the azimuthal anisotropy in lead-lead collisions at [Formula: see text] TeV are shown using a dataset of approximately 7 [Formula: see text]b[Formula: see text] collected at the LHC in 2010. The measurements are performed for charged ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2014
The inclusive top quark pair ([Formula: see text]) production cross-section [Formula: see text] has been measured in proton-proton collisions at [Formula: see text] and [Formula: see text] with the ATLAS experiment at the LHC, using [Formula: see text] eve ...
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Journal ArticleJournal of High Energy Physics · December 1, 2013
The results of a search for pair production of supersymmetric partners of the Standard Model third-generation quarks are reported. This search uses 20.1 fb−1 of pp collisions at √s = 8TeV collected by the ATLAS experiment at the Large Hadron Col ...
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Journal ArticlePhysical review letters · December 2013
This Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4.7 fb(-1) of proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at √s=7 TeV. Final states containing o ...
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Journal ArticleJournal of High Energy Physics · December 1, 2013
A search for neutral Higgs bosons of the Minimal Supersymmetric Standard Model (MSSM) is reported. The analysis is based on a sample of proton-proton collisions at a centre-of-mass energy of 7TeV recorded with the ATLAS detector at the Large Hadron Collide ...
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Journal ArticleJournal of High Energy Physics · December 1, 2013
In several extensions of the Standard Model, the top quark can decay into a bottom quark and a light charged Higgs boson H +, t → bH +, in addition to the Standard Model decay t → bW. Since W bosons decay to the three lepton generatio ...
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Journal ArticleJournal of High Energy Physics · December 1, 2013
A search for new phenomena in events with a high-energy jet and large missing transverse momentum is performed using data from proton-proton collisions at √s=7 TeV with the ATLAS experiment at the Large Hadron Collider. Four kinematic regions are explored ...
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Journal ArticleJournal of High Energy Physics · December 1, 2013
A search for pair-produced third generation scalar leptoquarks is presented, using proton-proton collisions at s=7 TeV at the LHC. The data were recorded with the ATLAS detector and correspond to an integrated luminosity of 4.7 fb-1. Each leptoq ...
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Journal ArticlePhysical review letters · December 2013
We measure the time dependence of the ratio of decay rates for D0→K(+)π(-) to the Cabibbo-favored decay D(0)→K(-)π(+). The charge conjugate decays are included. A signal of 3.3×10(4) D(*+)→π(+)D(0), D(0)→K(+)π(-) decays is obtained with D0 proper decay tim ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · November 26, 2013
We report measurements of the inclusive transverse momentum (pT) distribution of centrally produced KS0, K±(892), and φ0(1020) mesons up to pT=10 GeV/c in minimum bias events, and KS0 and Λ0 particles up to pT=20 ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · November 26, 2013
We report on a search for a dijet resonance in events with only two or three jets and a large imbalance in the total event transverse momentum. This search is sensitive to the possible production of a new particle in association with a W or Z boson, where ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · November 13, 2013
We present a measurement of the production cross section for ZW and ZZ boson pairs in final states with a pair of charged leptons, from the decay of a Z boson, and at least two jets, from the decay of a W or Z boson, using the full sample of proton-antipro ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · November 11, 2013
We present a measurement of the top-quark pair production cross section in proton-antiproton collisions at √s=1.96 TeV. The data were collected at the Fermilab Tevatron by the CDF II detector and correspond to an integrated luminosity of 8.8 fb-1, represen ...
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Journal ArticleJournal of High Energy Physics · November 1, 2013
A measurement of the top quark electric charge is carried out in the ATLAS experiment at the Large Hadron Collider using 2.05 fb-1 of data at a centre-of-mass energy of 7TeV. In units of the elementary electric charge, the top quark charge is de ...
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Journal ArticleJournal of High Energy Physics · November 1, 2013
The distributions of event-by-event harmonic flow coefficients υn for n = 2-4 are measured in √sNN = 2.76TeV Pb+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using charged particles with transverse ...
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Journal ArticlePhysical review letters · November 2013
We present a measurement of the total decay width of the top quark using events with top-antitop quark pair candidates reconstructed in the final state with one charged lepton and four or more hadronic jets. We use the full Tevatron run II data set of sqrt ...
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Journal ArticlePhysical review letters · November 2013
We report a measurement of the differential cross section dσ/d(cosθ(t)) for top-quark pair production as a function of the top-quark production angle in proton-antiproton collisions at sqrt[s] = 1.96 TeV. This measurement is performed using data collected ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · October 10, 2013
We measure the asymmetry in the charge-weighted rapidity qyℓ of the lepton in semileptonic tt̄ decays recorded with the CDF II detector using the full Tevatron Run II sample, corresponding to an integrated luminosity of 9.4 fb-1. A par ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · October 2, 2013
Drell-Yan lepton pairs are produced in the process p̄p→e +e-+X through an intermediate γ*/Z boson. The lepton angular distributions are used to provide information on the electroweak-mixing parameter sin2θw via it ...
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Journal ArticleJournal of High Energy Physics · October 1, 2013
A search is presented for new particles decaying to large numbers (7 or more) of jets, with missing transverse momentum and no isolated electrons or muons. This analysis uses 20:3 fb-1 of pp collision data at √s = 8 TeV collected by the ATLAS ex ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · October 1, 2013
Using data from proton-antiproton collisions at √s=1.96 TeV recorded by the CDF II detector at the Fermilab Tevatron, evidence for the excited resonance state Λb*0 is presented in its Λb0π -π+ decay followed by the Λb0→Λ c+π-
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · October 1, 2013
This Letter reports a measurement of the high-mass Drell–Yan differential cross-section in proton–proton collisions at a centre-of-mass energy of 7 TeV at the LHC. Based on an integrated luminosity of 4.9 fb−1, the differential cross-section in ...
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Journal ArticlePhysical review letters · October 2013
Measurements of the variation of inclusive jet suppression as a function of relative azimuthal angle, Δφ, with respect to the elliptic event plane provide insight into the path-length dependence of jet quenching. ATLAS has measured the Δφ dependence of jet ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · October 1, 2013
A search is presented for microscopic black holes in a like-sign dimuon final state in proton-proton collisions at √s=8 TeV. The data were collected with the ATLAS detector at the Large Hadron Collider in 2012 and correspond to an integrated luminosity of ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · September 23, 2013
We summarize and combine direct measurements of the mass of the W boson in √s=1.96 TeV proton-antiproton collision data collected by CDF and D0 experiments at the Fermilab Tevatron Collider. Earlier measurements from CDF and D0 are combined with the two la ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · September 17, 2013
We present a search for a standard model Higgs boson decaying to two W bosons that decay to leptons using the full data set collected with the CDF II detector in √s=1.96 TeV pp̄ collisions at the Fermilab Tevatron, corresponding to an integrated luminosity ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · September 17, 2013
We present a combination of searches for the standard model Higgs boson using the full CDF run II data set, which corresponds to an integrated luminosity of 9.45-10.0 fb-1 collected from √s=1.96 TeV pp̄ collisions at the Fermilab Tevatron. The se ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · September 17, 2013
We combine searches by the CDF and D0 Collaborations for the standard model Higgs boson with mass in the range 90-200 GeV/c2 produced in the gluon-gluon fusion, WH, ZH, tt̄H, and vector boson fusion processes, and decaying in the H→bb̄, H→W+W ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 2, 2013
Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, H→γγ, H→ZZ*→4ℓ and H→WW*→ℓνℓν. The results are based on the complete pp collision data sample ...
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Journal ArticleNew Journal of Physics · September 1, 2013
The ATLAS detector at the Large Hadron Collider is used to search for excited electrons and excited muons in the channel pp → ℓℓ* → ℓℓγ, assuming that excited leptons are produced via contact interactions. The analysis is based on 13 fb-1 of pp ...
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Journal ArticleJournal of High Energy Physics · September 1, 2013
This paper presents the application of a variety of techniques to study jet substructure. The performance of various modified jet algorithms, or jet grooming techniques, for several jet types and event topologies is investigated for jets with transverse mo ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · August 23, 2013
We present the first signature-based search for delayed photons using an exclusive photon plus missing transverse energy final state. Events are reconstructed in a data sample from the CDF II detector corresponding to 6.3 fb-1 of integrated lumi ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 9, 2013
In order to study further the long-range correlations ("ridge") observed recently in p + Pb collisions at √sNN= 5.02 TeV, the second-order azimuthal anisotropy parameter of charged particles, v2, has been measured with the cumulant me ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · August 5, 2013
We report on a measurement of the top-quark electric charge in tt̄ events in which one W boson originating from the top-quark pair decays into leptons and the other into hadrons. The event sample was collected by the CDF II detector in √s=1.96 TeV proton-an ...
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Journal ArticlePhysical review letters · July 2013
We present a search for the pair production of a narrow nonstandard-model strongly interacting particle that decays to a pair of quarks or gluons, leading to a final state with four hadronic jets. We consider both nonresonant production via an intermediate ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · July 1, 2013
A search has been performed for photons originating in the decay of a neutral long-lived particle, exploiting the capabilities of the ATLAS electromagnetic calorimeter to make precise measurements of the flight direction of photons, as well as the calorime ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · July 1, 2013
We present a measurement of the top-quark mass using the full data set of Tevatron √s=1.96 TeV proton-antiproton collisions recorded by the CDF II detector, corresponding to an integrated luminosity of 8.7 fb-1. The analysis uses events with one ...
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Journal ArticlePhysical review letters · July 2013
We report on a measurement of the cross section for direct-photon production in association with a heavy quark using the full data set of sqrt[s]=1.96 TeV proton-antiproton collisions corresponding to 9.1 fb-1 of integrated luminosity collected by the CD ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · June 4, 2013
The integrated and differential fiducial cross sections for the production of a W or Z boson in association with a high-energy photon are measured using pp collisions at √s=7 TeV. The analyses use a data sample with an integrated luminosity of 4.6 fb- ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · June 3, 2013
We present a measurement of the ratio of the top-quark branching fractions R=B(t→Wb)/B(t→Wq), where q represents quarks of type b, s, or d, in the final state with a lepton and hadronic jets. The measurement uses √s=1.96 TeV proton-antiproton collision dat ...
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Journal ArticleJournal of High Energy Physics · June 1, 2013
This paper reports a measurement of the W +b-jets (W +b+ X and W+b̄b+X) production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. These results are based on data corresponding to an integrated luminosity of 4.6 fb< ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · May 13, 2013
We present a measurement of the W-boson polarization in top-quark decays in tt- events with decays to dilepton final states using data corresponding to 5.1 fb-1 of integrated luminosity in pp- collisions collected by the CDF II detector at the T ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · May 3, 2013
We present new measurements of the inclusive forward-backward tt̄ production asymmetry, AFB, and its dependence on several properties of the tt̄ system. The measurements are performed with the full Tevatron data set recorded with the CDF II detect ...
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Journal ArticlePhysical review letters · May 2013
Two-particle correlations in relative azimuthal angle (Δø) and pseudorapidity (Δη) are measured in sqrt[s(NN)] = 5.02 TeV p+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using approximately 1 μb(-1) of data as a function ...
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Journal ArticlePhysical review letters · May 2013
We present a search for chargino-neutralino associated production using like electric charge dilepton events collected by the CDF II detector at the Fermilab Tevatron in proton-antiproton collisions at sqrt[s] = 1.96 TeV. One lepton is identified as the ha ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · April 4, 2013
We report on a search for Bs0→μ+μ- and B0→μ+μ- decays using proton-antiproton collision data at √s=1.96 TeV corresponding to 10 fb-1 of integrated luminosity collected by the CDF II detector at the Fer ...
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Journal ArticleNew Journal of Physics · April 1, 2013
A search is performed for WH production with a light Higgs boson decaying to hidden-sector particles resulting in clusters of collimated electrons, known as electron-jets. The search is performed with 2.04 fb-1 of data collected in 2011 with the ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · March 6, 2013
We present an updated search for the Higgs boson produced in association with a vector boson in the final state with missing transverse energy and two jets. We use the full CDF data set corresponding to an integrated luminosity of 9.45 fb-1 at a ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · March 4, 2013
Using 1.8 fb-1 of pp collisions at a center-of-mass energy of 7 TeV recorded by the ATLAS detector at the Large Hadron Collider, we present measurements of the production cross sections of Υ(1S,2S,3S) mesons. Υ mesons are reconstructed using the ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · March 4, 2013
A generic search for anomalous production of events with at least three charged leptons is presented. The search uses a pp-collision data sample at a center-of-mass energy of √s=7 TeV corresponding to 4.6 fb-1 of integrated luminosity collected ...
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Journal ArticlePhysical review letters · March 2013
This Letter reports a measurement of the cross section for producing pairs of central prompt isolated photons in proton-antiproton collisions at a total energy sqrt[s] = 1.96 TeV using data corresponding to 9.5 fb(-1) integrated luminosity collected with t ...
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Journal ArticlePhysical review letters · March 2013
We present a search for new particles in an extension to the standard model that includes a heavy Higgs boson (H(0)), a lighter charged Higgs boson (H(±)), and an even lighter Higgs boson h(0), with decays leading to a W-boson pair and a bottom-antibottom ...
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Journal ArticlePhysical review letters · March 2013
This Letter reports a search for a narrow resonant state decaying into two W bosons and two b quarks where one W boson decays leptonically and the other decays into a quark-antiquark pair. The search is particularly sensitive to top-antitop resonant produc ...
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Journal ArticleJournal of High Energy Physics · March 1, 2013
A measurement of the ZZ production cross section in proton-proton collisions at √ = 7 TeV using data recorded by the ATLAS experiment at the Large Hadron Collider is presented. In a data sample corresponding to an integrated luminosity of 4.6 fb-1
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · February 26, 2013
Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. In this Letter, results are presented of a search for events containing one or more such particles, which decay at a significant distance from their productio ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · February 21, 2013
We measure the polarization of W bosons from top-quark (t) decays into final states with a charged lepton and jets, tt̄→W+bW -b̄→ℓνbqq̄′b̄, using the full Run II data set collected by the CDF II detector, corresponding to an in ...
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Journal ArticleJournal of High Energy Physics · February 12, 2013
A search for direct chargino production in anomaly-mediated supersymmetry breaking scenarios is performed in pp collisions at √s=7TeV using 4.7 fb-1 of data collected with the ATLAS experiment at the LHC. In these models, the lightest chargino i ...
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Journal ArticleJournal of High Energy Physics · February 12, 2013
A search for resonances produced in 7 TeV proton-proton collisions and decaying into top-quark pairs is described. In this Letter events where the top-quark decay produces two massive jets with large transverse momenta recorded with the ATLAS detector at t ...
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Journal ArticlePhysical review letters · February 2013
The first observation of the production of a W boson with a single charm quark (c) jet in pp[over ¯] collisions at √s=1.96 TeV is reported. The analysis uses data corresponding to 4.3 fb(-1), recorded with the CDF II detector at the Fermilab Tevatron. Ch ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 4, 2013
A search for nonresonant new phenomena, originating from either contact interactions or large extra spatial dimensions, has been carried out using events with two isolated electrons or muons. These events, produced at the LHC in proton-proton collisions at ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 2, 2013
The lifetime of the Bc- meson is measured using 272 exclusive Bc-→J/ψ(→μ+μ-)π- decays reconstructed in data from proton-antiproton collisions corresponding to an integrated luminosity of 6.7 fb-1 recorded by the ...
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Journal ArticleJournal of High Energy Physics · January 1, 2013
The production cross-section of B+ mesons is measured as a function of transverse momentum pT and rapidity y in proton-proton collisions at centre-of-mass energy √s = 7 TeV, using 2.4 fb-1 of data recorded with the ATLAS detector at the Large Hadron Collid ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2013
A search is presented for direct chargino production based on a disappearing-track signature using 20:3 fb-1 of proton-proton collisions at √s = 8 TeV collected with the ATLAS experiment at the LHC. In anomaly-mediated supersymmetry breaking (AM ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2013
An updated search is performed for gluino, top squark, or bottom squark R-hadrons that have come to rest within the ATLAS calorimeter, and decay at some later time to hadronic jets and a neutralino, using 5.0 and 22:9 fb-1 of pp collisions at 7 ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2013
A measurement of jet shapes in top-quark pair events using 1.8 fb-1 of [Formula: see text]pp collision data recorded by the ATLAS detector at the LHC is presented. Samples of top-quark pair events are selected in both the single-lepton an ...
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Journal ArticleNuclear Physics B · 2013
The dynamics of isolated-photon plus jet production in pp collisions at a centre-of-mass energy of 7 TeV has been studied with the ATLAS detector at the LHC using an integrated luminosity of 37 pb-1. Measurements of isolated-photon plus jet bin-averaged cr ...
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Journal ArticleJournal of High Energy Physics · January 1, 2013
This paper reports the result of a search for the standard model Higgs boson in events containing four reconstructed jets associated with quarks. For masses below 135 GeV/c 2, the Higgs boson decays to bottom-antibottom quark pairs are dominant ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2013
We present a measurement of the mass difference between top (t) and antitop (t̄) quarks using tt̄ candidate events reconstructed in the final state with one lepton and multiple jets. We use the full data set of Tevatron √s=1.96 TeV proton-antiproton collisio ...
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Journal ArticleJournal of High Energy Physics · January 1, 2013
The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s=7TeV . The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2013
A search for supersymmetric particles in final states with zero, one, and two leptons, with and without jets identified as originating from b-quarks, in 4.7 fb-1 of [Formula: see text]pp collisions produced by the Large Hadron Coll ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2013
A measurement of the top quark pair production cross section in the final state with a hadronically decaying tau lepton and jets is presented. The analysis is based on proton-proton collision data recorded by the ATLAS experiment at the LHC, with a centre- ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2013
A measurement of splitting scales, as defined by the kT clustering algorithm, is presented for final states containing a W boson produced in proton-proton collisions at a centre-of-mass energy of 7 TeV. The measurement is based on ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2013
A search for new particles that decay into top quark pairs (tt) is performed with the ATLAS experiment at the LHC using an integrated luminosity of 4.7 fb–1of proton–proton (pp) collision data collected at a center-of-mass energy √s = 7 TeV. In ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2013
A search for a charged Higgs boson (H+) in [Formula: see text] decays is presented, where one of the top quarks decays via t→H+b, followed by H+→ two jets ([Formula: see text]). The other ...
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Journal ArticleJournal of High Energy Physics · January 1, 2013
Measurements of the production of jets of particles in association with a Z boson in pp collisions at √s=7 TeV are presented, using data corresponding to an integrated luminosity of 4.6 fb-1 collected by the ATLAS experiment at the Large Hadron ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2013
The inclusive jet cross-section has been measured in proton-proton collisions at [Formula: see text] in a dataset corresponding to an integrated luminosity of [Formula: see text] collected with the ATLAS detector at the Large Hadron Collider in 2011. Jets ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · January 1, 2013
Studies of the spin and parity quantum numbers of the Higgs boson are presented, based on proton-proton collision data collected by the ATLAS experiment at the LHC. The Standard Model spin-parity JP=0+ hypothesis is compared with alte ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · December 5, 2012
We present a search for a new heavy vector boson Z′ that decays to gluons. Decays to on-shell gluons are suppressed, leading to a dominant decay mode of Z′→g*g. We study the case where the off-shell gluon g* converts to a pair of top quarks, leading to a f ...
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Journal ArticleEuropean Physical Journal C · December 4, 2012
A search for doubly charged Higgs bosons decaying to pairs of electrons and/or muons is presented. The search is performed using a data sample corresponding to an integrated luminosity of 4.7 fb−1of pp collisions at √s = 7 TeV collected by the A ...
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Journal ArticleJournal of High Energy Physics · December 1, 2012
A search for new phenomena in final states with four or more leptons (electrons or muons) is presented. The analysis is based on 4.7 fb-1 of √s =7 TeV proton-proton collisions delivered by the Large Hadron Collider and recorded with the ATLAS de ...
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Journal ArticleJournal of High Energy Physics · December 1, 2012
A search is conducted for hadronic three-body decays of a new massive coloured particle in √s = 7 TeV pp collisions at the LHC using an integrated luminosity of 4.6 fb-1 collected by the ATLAS detector. Supersymmetric gluino pair production in t ...
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Journal ArticleEuropean Physical Journal C · November 20, 2012
A search for supersymmetry (SUSY) in events with large missing transverse momentum, jets, and at least one hadronically decaying τ lepton, with zero or one additional light lepton (e/μ), has been performed using 4.7 fb−1of proton-proton collisio ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · November 6, 2012
The combination of searches performed by the CDF and D0 collaborations at the Fermilab Tevatron Collider for neutral Higgs bosons produced in association with b quarks is reported. The data, corresponding to 2.6fb -1 of integrated luminosity at ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · November 2, 2012
The top quark is the heaviest known elementary particle, with a mass about 40 times larger than the mass of its isospin partner, the bottom quark. It decays almost 100% of the time to a W boson and a bottom quark. Using top-antitop pairs at the Tevatron pr ...
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Journal ArticlePhysical review letters · November 2012
We present the first direct measurement of the top-quark mass using tt events decaying in the hadronic τ+jets decay channel. Using data corresponding to an integrated luminosity of 2.2 fb(-1) collected by the CDF II detector in pp collisions at sqrt[s] = 1 ...
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Journal ArticlePhysical review letters · November 2012
A search is presented for the standard model Higgs boson produced in association with top quarks using the full Run II proton-antiproton collision data set, corresponding to 9.45 fb(-1), collected by the Collider Detector at Fermilab. No significant excess ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · October 31, 2012
An inclusive search for the standard model Higgs boson using the four-lepton final state in proton-antiproton collisions produced by the Tevatron at √s=1.96TeV is conducted. The data are recorded by the CDF II detector and correspond to an integrated lumin ...
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Journal ArticleJournal of High Energy Physics · October 25, 2012
We report on a search for the supersymmetric partner of the top quark (scalar top) decaying into a charm quark and a neutralino in (Formula presented.) collisions at (Formula presented.) = 1.96TeV. The data sample, collected by the CDF II detector at the F ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · October 22, 2012
A search for a narrow Higgs boson resonance in the diphoton mass spectrum is presented based on data corresponding to 10fb -1 of integrated luminosity collected by the CDF experiment from proton-antiproton collisions at s=1.96TeV. To increase th ...
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Journal ArticlePhysical review letters · October 2012
We report a measurement of the bottom-strange meson mixing phase β(s) using the time evolution of B(s)(0)→J/ψ(→μ(+)μ(-))φ(→K(+)K(-)) decays in which the quark-flavor content of the bottom-strange meson is identified at production. This measurement uses the ...
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Journal ArticlePhysical review letters · October 2012
We present a precision measurement of the top-quark mass using the full sample of Tevatron √s = 1.96 TeV proton-antiproton collisions collected by the CDF II detector, corresponding to an integrated luminosity of 8.7 fb(-1). Using a sample of tt¯ candidate ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · September 26, 2012
The transverse momentum cross section of e +e - pairs in the Z-boson mass region of 66-116GeV/c2 is precisely measured using Run II data corresponding to 2.1fb -1 of integrated luminosity recorded by the Collider Detector at Fermilab. The cross section is ...
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Journal ArticlePhysical review letters · September 2012
We report a measurement of the difference (ΔA(CP)) between time-integrated CP-violating asymmetries in D(0)→K(+)K(-) and D(0)→π(+)π(-) decays reconstructed in the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab, ...
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Journal ArticlePhysical review letters · September 2012
We present a search for the standard model Higgs boson produced in association with a W boson in sqrt[s]=1.96 TeV pp collision data collected with the CDF II detector at the Tevatron corresponding to an integrated luminosity of 9.45 fb(-1). In events con ...
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Journal ArticlePhysical review letters · September 2012
We report on a search for the standard model Higgs boson produced in association with a vector boson in the full data set of proton-antiproton collisions at sqrt[s]=1.96 TeV recorded by the CDF II detector at the Tevatron, corresponding to an integrated l ...
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Journal ArticlePhysical review letters · September 2012
We combine the results of searches for the standard model (SM) Higgs boson based on the full CDF Run II data set obtained from sqrt[s]=1.96 TeV pp collisions at the Fermilab Tevatron corresponding to an integrated luminosity of 9.45 fb(-1). The searches ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · August 23, 2012
This article describes the current most precise measurement of the WZ production cross section as well as limits on anomalous WWZ couplings at a center-of-mass energy of 1.96 TeV in proton-antiproton collisions for the Collider Detector at Fermilab (CDF). ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · August 20, 2012
We present a search for the standard model Higgs boson produced in association with a W ± boson. This search uses data corresponding to an integrated luminosity of 7.5fb -1 collected by the CDF detector at the Tevatron. We select WH→νbb̄ candidate events wi ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · August 17, 2012
We report on a study of diffractive dijet production in p̄p collisions at √s=1.96TeV using the CDF II detector at the Fermilab Tevatron p̄p collider. A data sample from 310pb -1 of integrated luminosity collected by triggering on a high transverse energy jet ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · August 13, 2012
We report a measurement of time-integrated CP-violation asymmetries in the resonant substructure of the three-body decay D0→KS0π +π - using CDF II data corresponding to 6.0fb -1 of integrated luminosity from Tevatron pp̄ collisions at √s=1.96TeV. The charm ...
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Journal ArticlePhysical review letters · August 2012
We combine searches by the CDF and D0 Collaborations for the associated production of a Higgs boson with a W or Z boson and subsequent decay of the Higgs boson to a bottom-antibottom quark pair. The data, originating from Fermilab Tevatron pp collisions at ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · July 24, 2012
A measurement of the top quark mass (M top) in the all-hadronic decay channel is presented. It uses 5.8 fb -1 of pp data collected with the CDF II detector at the Fermilab Tevatron Collider. Events with six to eight jets are selected ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · May 16, 2012
Using data from pp̄ collisions at √s=1.96TeV recorded by the CDF II detector at the Fermilab Tevatron, we present improved measurements of the masses and first measurements of natural widths of the four bottom baryon resonance states Σb+, Σb*+ and Σb-, Σb*- ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · May 3, 2012
This paper presents a search for anomalous production of multiple low-energy leptons in association with a W or Z boson using events collected at the CDF experiment corresponding to 5.1fb -1 of integrated luminosity. This search is sensitive to a wide rang ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · May 3, 2012
A study of the substructure of jets with transverse momentum greater than 400GeV/c produced in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV at the Fermilab Tevatron Collider and recorded by the CDF II detector is presented. The distr ...
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Journal ArticlePhysical review letters · May 2012
We present the results of a search for dark matter production in the monojet signature. We analyze a sample of Tevatron pp[over ¯] collisions at √s=1.96 TeV corresponding to an integrated luminosity of 6.7 fb(-1) recorded by the CDF II detector. In events ...
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Journal ArticlePhysical review letters · May 2012
We present a search for a new heavy particle X produced in association with a top quark, pp[over ¯]→t(X→t[over ¯]q) or pp[over ¯]→t[over ¯](X[over ¯]→tq[over ¯]), where q stands for up quarks and down quarks. Such a particle may explain the recent anomalou ...
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Journal ArticlePhysical review letters · May 2012
We search for annihilation decay modes of neutral b mesons into pairs of charmless charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using a data sample corresponding to 6 fb(-1) of integrated luminosity, we obtain the first evi ...
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Journal ArticlePhysical review letters · May 2012
We report a new search for dark matter in a data sample of an integrated luminosity of 7.7 fb-1 of Tevatron pp[over ¯] collisions at √[s]=1.96 TeV, collected by the CDF II detector. We search for production of a dark-matter candidate, D, in association w ...
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Journal ArticlePhysical review letters · May 2012
The decays Bs0→Ds(*)+Ds(*)- are reconstructed in a data sample corresponding to an integrated luminosity of 6.8 fb-1 collected by the CDF II detector at the Tevatron pp[over ¯] collider. All decay modes are observed with a significance of more than 10σ, a ...
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Journal ArticlePhysical review letters · May 2012
We report on a search for the standard model Higgs boson decaying into pairs of τ leptons in pp collisions produced by the Tevatron at sqrt[s]=1.96 TeV. The analyzed data sample was recorded by the CDFII detector and corresponds to an integrated luminosit ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · April 27, 2012
We report the combination of recent measurements of the helicity of the W boson from top quark decay by the CDF and D0 collaborations, based on data samples corresponding to integrated luminosities of 2.7-5.4fb -1 of pp̄ collisions collected duri ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · April 24, 2012
We present a measurement of the CP-violating parameter βsJ/ψ using approximately 6500 Bs0→J/ψ decays reconstructed with the CDF II detector in a sample of pp̄ collisions at √s=1.96TeV corresponding to 5.2fb -1 integrated luminosity produced by the Tevatron ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · April 4, 2012
We present one additional study of multi-muon events produced at the Fermilab Tevatron collider and recorded by the CDF II detector. We use a data set acquired with a dedicated dimuon trigger and corresponding to an integrated luminosity of 3.9 fb -1< ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · April 2, 2012
This paper presents a search for standard model Higgs boson production in association with a W boson using events recorded by the CDF experiment in a data set corresponding to an integrated luminosity of 5.6fb -1. The search is performed using a matrix ele ...
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Journal ArticlePhysical review letters · April 2012
The angular distributions of muons from Υ(1S,2S,3S) → μ+ μ- decays are measured using data from pp collisions at sqrt[s] = 1.96 TeV corresponding to an integrated luminosity of 6.7 fb(-1) and collected with the CDF II detector at the Fermilab Tevatron. T ...
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Journal ArticlePhysical review letters · March 2012
In this Letter, we present a precise measurement of the total ZZ production cross section in pp collisions at sqrt[s]=1.96 TeV, using data collected with the CDF II detector corresponding to an integrated luminosity of approximately 6 fb(-1). The result ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · February 22, 2012
We present a search for neutral Higgs bosons decaying into bb̄, produced in association with b quarks in pp̄ collisions. This process could be observable in supersymmetric models with high values of tanβ. The event sample corresponds to 2.6fb -1 of integrate ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · February 2, 2012
We present a search for the rare radiative decay W ±→ π ±γ using data corresponding to an integrated luminosity of 4.3fb -1 of proton-antiproton collisions at a center-of-mass energy of 1.96 TeV collected by the CDF experiment at Fermilab. As no statistica ...
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Journal ArticlePhysical review letters · February 2012
We report an indirect search for nonstandard model physics using the flavor-changing neutral current decays B→K(*)μ(+)μ(-). We reconstruct the decays and measure their angular distributions, as a function of q(2)=M(μμ)(2)c(2), where M(μμ) is the dimuon mas ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 27, 2012
We report on a measurement of CP-violating asymmetries (A CP) in the Cabibbo-suppressed D0→π +π - and D0→K +K - decays reconstructed in a data sample corresponding to 5.9fb -1 of integrated luminosity collected by the upgraded Collider Detector at Fermilab ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 24, 2012
A search is performed for heavy metastable particles that decay into jet pairs with a macroscopic lifetime (cτ∼1cm) in pp̄ collisions at √s=1.96TeV using data from the CDF II detector at Fermilab corresponding to an integrated luminosity of 3.2fb-1. To esti ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 24, 2012
We search for high-mass resonances decaying into Z boson pairs using data corresponding to 6fb -1 collected by the CDF experiment in pp̄ collisions at √s=1.96TeV. The search is performed in three distinct final states: ZZ→ +-+-, ZZ→ +-νν, and ZZ→ +-jj. For ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 6, 2012
Diboson production (WW+WZ+ZZ) has been observed at the Tevatron in hadronic decay modes dominated by the WW process. This paper describes the measurement of the cross section of WZ and ZZ events in final states with large E T and using b-jet identification ...
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Journal ArticlePhysical review letters · January 2012
A search for a narrow Higgs boson resonance in the diphoton mass spectrum is presented based on data corresponding to 7.0 fb{-1} of integrated luminosity from pp collisions at sqrt[s]=1.96 TeV collected by the CDF experiment. No evidence of such a resona ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2012
We report a set of measurements of inclusive invariant p T differential cross sections of Λ0, Λ ̄0, Ξ ±, and Ω ± hyperons reconstructed in the central region with pseudorapidity |η|<1 and p T up to 10GeV/c. Events are collected with a minimum-bias trigge ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2012
We report an analysis of the Λb0→Λc+π -π +π - decay in a data sample collected by the CDF II detector at the Fermilab Tevatron corresponding to 2.4fb -1 of integrated luminosity. We reconstruct the currently largest samples of the decay modes Λb0→Λ c(2595) ...
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Journal ArticlePhysical review letters · December 2011
We present a measurement of the B(s)(0) lifetime in fully and partially reconstructed B(s)(0)→D(s)(-)(ϕπ(-))X decays in 1.3 fb(-1) collected in pp ¯ collisions at √s=1.96 TeV by the CDF II detector at the Fermilab Tevatron. We measure τ(B(s)(0))=1.518±0.0 ...
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Journal ArticlePhysical review letters · December 2011
We present the results of a search for pair production of a heavy toplike (t') quark decaying to Wq final states using data corresponding to an integrated luminosity of 5.6 fb(-1) collected by the CDF II detector in pp collisions at √s=1.96 TeV. We perform ...
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Journal ArticlePhysical review letters · December 2011
We present the first measurement of polarization and CP-violating asymmetries in a B(s)(0) decay into two light vector mesons, B(s)(0)→φφ, and an improved determination of its branching ratio using 295 decays reconstructed in a data sample corresponding to ...
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Journal ArticlePhys. Rev. D · November 2011
We report the first reconstruction in hadron collisions of the suppressed decays B-→D(→K+π-)K- and B-→D(→K+π-)π-, sensitive to the Cabibbo-Kobayashi-Maskawa phase γ, using data from 7 fb-1 of integrated luminosity collected by the CDF II detector at the T ...
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Journal ArticlePhys. Rev. Lett. · November 2011
We present a measurement of the top-quark mass using a sample of $t\bar{t}$ events in 5.7 fb-1 of integrated luminosity from $p\bar{p}$ collisions at the Fermilab Tevatron with $\sqrt{s}=1.96$ TeV and collected by the CDF II Detector. We select events ha ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · April 25, 2011
This Letter reports a measurement of the top quark mass, Mtop, in data from pp- collisions at s=1.96 TeV corresponding to 2.7 fb-1 of integrated luminosity at the Fermilab Tevatron using the CDF II detector. Events with the lepton+jets topology ...
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Journal ArticlePhysical Review Letters · 2011
A search has been performed for Bs0→μ+μ- and B0→μ+μ- decays using 7fb-1 of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. The observed number of B0 candidates is consistent with background-only expectations and yi ...
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Journal ArticleEuropean Physical Journal C · January 1, 2011
We use a new method to estimate with 5% accuracy the contribution of pion and kaon in-flight-decays to the dimuon data set acquired with the CDF detector. Based on this improved estimate, we show that the total number and the properties of the collected di ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2011
Using data corresponding to 6.0fb-1 of pp̄ collisions at √s=1.96TeV collected by the CDF II detector, we present a cross section measurement of top-quark pair production with an additional radiated photon in the central region with 10 GeV or more of transve ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2011
We report measurements of the resonance properties of Λ c(2595)+ and Λc(2625)+ baryons in their decays to Λc+π+π- as well as Σc(2455)++,0 and Σ c(2520)++,0 baryons in their decays to Λc+π± final states. These measurements are performed using data correspon ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · September 1, 2010
We report on a CDF measurement of the total cross section and rapidity distribution, dσ/dy, for γ*Z→e+e- events in the Z boson mass region (66-1 of integrated lumino ...
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Journal ArticleEuropean Physical Journal C · June 15, 2010
The European Physical Journal C-Particles and Fields-publishes scientific manuscripts of relevance to the scientific community following careful and strict peer reviewing and, whenever appropriate and necessary, through discussion with the authors, so as t ...
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Journal ArticlePhysical Review Letters · 2010
We search for the standard model Higgs boson produced with a Z boson in 4.1fb⊃-1 of integrated luminosity collected with the CDF II detector at the Tevatron. In events consistent with the decay of the Higgs boson to a bottom-quark pair and the Z boson to e ...
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Journal ArticlePhys. Rev. D · December 2009
A measurement of the cross section for the inclusive production of isolated photons by the CDF experiment at the Fermilab Tevatron collider is presented. The measurement covers the pseudorapidity region $|\eta\gamma|30$ GeV and is based on 2.5 fb-1 of in ...
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Journal ArticleEuropean Physical Journal C · July 1, 2009
We report a search for narrow resonances, produced in p p̄ collisions at √ s=1.96 TeV, that decay into muon pairs with invariant mass between 6.3 and 9.0 GeV/c 2. The data, collected with the CDF II detector at the Fermilab Tevatron collider, cor ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · June 10, 2009
We report a measurement of the ratio of branching fractions of the decays B±→J/ψπ± and B±→J/ψK± using the CDF II detector at the Fermilab Tevatron Collider. The signal from the Cabbibo-suppressed B±→J/ψπ± decay is separated from B±→J/ψK± using the B±→J/ψK± ...
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Journal ArticlePhysical review letters · June 2009
This Letter presents a search for exclusive Z boson production in proton-antiproton collisions at sqrt[s]=1.96 TeV, using the CDF II detector. No exclusive Z-->l;{+}l;{-} candidates are observed and the first upper limit on the exclusive Z cross section in ...
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Journal ArticlePhysical review letters · June 2009
In CDF we have observed the reactions p + p[over] --> p + X + p[over], with X being a centrally produced J/psi, psi(2S), or chi_{c0}, and gammagamma-->micro;{+}micro;{-} in pp[over] collisions at sqrt[s] = 1.96 TeV. The event signature requires two opposit ...
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Journal ArticlePhysical review letters · May 2009
We report results from a search for the lepton flavor violating decays B_{s};{0} --> e;{+} micro;{-} and B;{0} --> e;{+} micro;{-}, and the flavor-changing neutral-current decays B_{s};{0} --> e;{+} e;{-} and B;{0} --> e;{+} e;{-}. The analysis uses data c ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · April 20, 2009
Fully reconstructed t over(t, ̄) → W+ b W- over(b, ̄) → ℓ ν q over(q, ̄)′ b over(b, ̄) events are used to determine the fractions of right-handed (f+) and longitudinally polarized (f0) W bosons produced in ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · March 2, 2009
A measurement of the b jet production cross section is presented for events containing a Z boson produced in pp̄ collisions at s=1.96TeV, using data corresponding to an integrated luminosity of 2fb-1 collected by the CDF II detector at the Tevatron. Z boson ...
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Journal ArticlePhysical review letters · March 2009
We report on a search for inclusive production of squarks and gluinos in pp[over ] collisions at sqrt[s]=1.96 TeV, in events with large missing transverse energy and multiple jets of hadrons in the final state. The study uses a CDF Run II data sample corre ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 5, 2009
We search for b→sμ+μ- transitions in B meson (B+, B0, or Bs0) decays with 924pb-1 of pp̄ collisions at s=1.96TeV collected with the CDF II detector at the Fermilab Tevatron. We find excesses with significances of 4.5, 2.9, and 2.4 standard deviations in the ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 5, 2009
Data collected in run II of the Fermilab Tevatron are searched for indications of new electroweak-scale physics. Rather than focusing on particular new physics scenarios, CDF data are analyzed for discrepancies with the standard model prediction. A model-i ...
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Journal ArticlePhys. Rev. Lett. · 2009
We report on a search for the standard-model Higgs boson in pp̅ collisions at sqrt[s]=1.96 TeV using an integrated luminosity of 2.0 fb-1. We look for production of the Higgs boson decaying to a pair of bottom quarks in association with a vector boson V ...
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Journal ArticlePhys. Rev. Lett. · 2009
We present the results of a search for Higgs bosons predicted in two-Higgs-doublet models, in the case where the Higgs bosons decay to tau lepton pairs, using 1.8 fb-1 of integrated luminosity of pp̅ collisions recorded by the CDF II experiment at the Fer ...
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Journal ArticlePhys. Rev. Lett. · 2009
A search for a narrow diphoton mass resonance is presented based on data from 3.0 fb-1 of integrated luminosity from pp̅ collisions at sqrt[s]=1.96 TeV collected by the CDF experiment. No evidence of a resonance in the diphoton mass spectrum is observed, ...
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Journal ArticlePhys. Rev. D · 2009
We have used the Collider Detector at Fermilab (CDF-II) to search for the flavor-changing neutral-current (FCNC) top-quark decay t→Zc using a technique employing ratios of W and Z production, measured in pp̅ data corresponding to an integrated luminosity o ...
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Journal ArticlePhys. Rev. D · 2009
We report the observation of the bottom, doubly-strange baryon Ωb- through the decay chain Ωb-→J/ψΩ-, where J/ψ→μ+μ-, Ω-→ΛK-, and Λ→pπ-, using 4.2 fb-1 of data from pp̅ collisions at sqrt[s]=1.96 TeV, and recorded with the Collider Detector at Fermilab. ...
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Journal ArticlePhys. Rev. D · 2009
We have measured the differential cross section for the inclusive production of ψ(2S) mesons decaying to μ+μ- that were produced in prompt or B-decay processes from pp̅ collisions at 1.96 TeV. These measurements have been made using a data set from an inte ...
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Journal ArticlePhys. Rev. D · 2009
We report a set of measurements of particle production in inelastic pp̅ collisions collected with a minimum-bias trigger at the Tevatron Collider with the CDF II experiment. The inclusive charged particle transverse momentum differential cross section is m ...
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Journal ArticlePhys. Rev. D · 2009
We present the first measurement of the mass of the top quark in a sample of tt̅ →ℓν̅ bb̅ qq̅ events (where ℓ=e,μ) selected by identifying jets containing a muon candidate from the semileptonic decay of heavy-flavor hadrons (soft muon b tagging). The pp̅ coll ...
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Journal ArticlePhys. Rev. D · 2009
We report on a search for the process pp̅ →γ+W/Z with W/Z→qq̅ in events containing two jets and a photon at the center-of-mass energy sqrt[s]=1.96 TeV, using 184 pb-1 of data collected by the CDF II detector. A neural network event selection has been deve ...
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Journal ArticlePhys. Rev. D · 2009
We present a search for associated production of the standard model Higgs boson and a Z boson where the Z boson decays to two leptons and the Higgs decays to a pair of b quarks in pp̅ collisions at the Fermilab Tevatron. We use event probabilities based on ...
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Journal ArticlePhys. Rev. Lett. · 2009
We present a search for a standard model Higgs boson produced in association with a W boson using 2.7 fb-1 of integrated luminosity of pp̅ collision data taken at sqrt[s]=1.96 TeV. Limits on the Higgs boson production rate are obtained for masses between ...
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Journal ArticlePhys. Rev. Lett. · 2009
We present new limits on resonant tb̅ production in pp̅ collisions at sqrt[s]=1.96 TeV, using 1.9 fb-1 of data recorded with the CDF II detector at the Fermilab Tevatron. We reconstruct a candidate tb̅ mass in events with a lepton, neutrino candidate, an ...
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Journal ArticlePhys. Rev. Lett. · 2009
We search for new charmless decays of neutral b hadrons to pairs of charged hadrons, using 1 fb-1 of data collected by the CDF II detector at the Fermilab Tevatron. We report the first observation of the Bs0→K-π+ decay and measure B(Bs0→K-π+)=(5.0 ± ...
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Journal ArticlePhys. Rev. D · 2009
We present a search for standard model Higgs boson production in association with a W boson in proton-antiproton collisions (pp̅ →W ± H→ℓνbb̅ ) at a center of mass energy of 1.96 TeV. The search employs data collected with the CDF II detector that cor ...
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Journal ArticlePhys. Rev. Lett. · 2009
We report the observation of single top-quark production using 3.2 fb-1 of pp̅ collision data with sqrt[s]=1.96 TeV collected by the Collider Detector at Fermilab. The significance of the observed data is 5.0 standard deviations, and the expected sensiti ...
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Journal ArticlePhys. Rev. Lett. · 2009
A combined mass and particle identification fit is used to make the first observation of the decay B̅ s0→Ds ± K∓ and measure the branching fraction of B̅ s0→Ds ± K∓ relative to B̅ s0→Ds+π-. This analysis uses 1.2 fb-1 integrated luminosity of p ...
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Journal ArticlePhys. Rev. Lett. · 2009
We report on the first direct search for charged Higgs bosons decaying into cs̅ in tt̅ events produced by pp̅ collisions at sqrt[s]=1.96 TeV. The search uses a data sample corresponding to an integrated luminosity of 2.2 fb-1 collected by the CDF II dete ...
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Journal ArticlePhys. Rev. Lett. · 2009
We present an analysis of the mass of the X(3872) reconstructed via its decay to J/ψπ+π- using 2.4 fb-1 of integrated luminosity from pp̅ collisions at sqrt[s]=1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. The possible existence ...
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Journal ArticlePhys. Rev. Lett. · 2009
Evidence is reported for a narrow structure near the J/ψϕ threshold in exclusive B+→J/ψϕK+ decays produced in p̅ p collisions at sqrt[s]=1.96 TeV. A signal of 14 ± 5 events, with statistical significance in excess of 3.8 standard deviations, is obse ...
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Journal ArticlePhys. Rev. D · 2009
This paper reports a measurement of the cross section for the pair production of top quarks in pp̅ collisions at sqrt[s]=1.96 TeV at the Fermilab Tevatron. The data were collected from the CDF run II detector in a set of runs with a total integrated lumin ...
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Journal ArticlePhysical Review D · 2009
We present a measurement of the top quark mass in the all hadronic channel (tt̅ →bb̅ q1q̅ 2q3q̅ 4) using 943 pb-1 of pp̅ collisions at sqrt[s]=1.96 TeV collected at the CDF II detector at Fermilab (CDF). We apply the standard model production and decay matri ...
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Journal ArticlePhys. Rev. Lett. · 2009
We present the first direct measurement of the W production charge asymmetry as a function of the W boson rapidity yW in pp̅ collisions at sqrt[s]=1.96 TeV. We use a sample of W→eν events in data from 1 fb-1 of integrated luminosity collected using the C ...
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Journal ArticlePhys. Rev. D · 2009
We present a search for WW and WZ production in final states that contain a charged lepton (electron or muon) and at least two jets, produced in sqrt[s]=1.96 TeV pp̅ collisions at the Fermilab Tevatron, using data corresponding to 1.2 fb-1 of integrated ...
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Journal ArticlePhysical Review Letters · 2009
We present a measurement of the tt̄ differential cross section with respect to the tt̄ invariant mass, dσ/dMtt̄, in pp̄ collisions at s=1.96TeV using an integrated luminosity of 2.7fb-1 collected by the CDF II experiment. The tt̄ invariant mass spectrum is sens ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2009
We present a measurement of the ratio of the tt̄ production cross section via gluon-gluon fusion to the total tt̄ production cross section in pp̄ collisions at s=1.96TeV at the Tevatron. Using a data sample with an integrated luminosity of 955pb-1 recorded by ...
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Journal ArticlePhys. Rev. Lett. · 2009
We present an analysis of the mass of the X(3872) reconstructed via its decay to J/ψπ+π- using 2.4 fb-1 of integrated luminosity from pp̅ collisions at sqrt[s]=1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. The possible existence ...
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Journal ArticlePhys. Rev. D · 2009
We compare the inclusive production of events containing a lepton (ℓ), a photon (γ), significant transverse momentum imbalance (E̸T), and a jet identified as containing a b-quark, to SM predictions. The search uses data produced in proton-antiproton collisi ...
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Journal ArticlePhys. Rev. Lett. · 2009
We performed a signature-based search for long-lived charged massive particles produced in 1.0 fb-1 of pp̅ collisions at sqrt[s]=1.96 TeV, collected with the CDF II detector using a high transverse-momentum (pT) muon trigger. The search used time of flig ...
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Journal ArticlePhys. Rev. D · 2009
We present a signature-based search for the anomalous production of events containing a photon, two jets, of which at least one is identified as originating from a b quark, and missing transverse energy (E̸T). The search uses data corresponding to 2.0 fb-1 ...
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Journal ArticlePhys. Rev. Lett. · 2009
We present the first observation in hadronic collisions of the electroweak production of vector boson pairs (VV, V=W, Z) where one boson decays to a dijet final state. The data correspond to 3.5 fb-1 of integrated luminosity of pp̅ collisions at sqrt[s]=1 ...
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Journal ArticlePhys. Rev. Lett. · 2009
In CDF we have observed the reactions p+p̅ →p+X+p̅ , with X being a centrally produced J/ψ, ψ(2S), or χc0, and γγ→μ+μ- in pp̅ collisions at sqrt[s]=1.96 TeV. The event signature requires two oppositely charged central muons, and either no other particles or ...
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Journal ArticlePhysical review letters · January 2009
We present the first direct experimental bound on the total decay width of the top quark, Gamma(t), using 955 pb(-1) of the Tevatron's pp collisions recorded by the Collider Detector at Fermilab. We identify 253 top-antitop pair candidate events. The distr ...
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Journal ArticlePhysical review letters · January 2009
Models of maximal flavor violation (MxFV) in elementary particle physics may contain at least one new scalar SU(2) doublet field Phi(FV)=(eta(0),eta(+)) that couples the first and third generation quarks (q_(1), q_(3)) via a Lagrangian term L(FV)=xi(13)Phi ...
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Journal ArticlePhysical review letters · January 2009
We present a search for a Higgs boson decaying to two W bosons in pp[over ] collisions at sqrt[s]=1.96 TeV center-of-mass energy. The data sample corresponds to an integrated luminosity of 3.0 fb;(-1) collected with the CDF II detector. We find no evidence ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2009
This article presents the first measurement of the ratio of branching fractions B(Λb0→Λc+μ-ν̄μ)/ B(Λb0→Λc+π-). Measurements in two control samples using the same technique B(B̄0→D+μ- ν̄μ)/B(B̄0→D+π-) and B(B̄ 0→D*(2010)+μ-ν̄μ)/ B(B̄0→D*(2010)+π-) are also reporte ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · December 1, 2008
We present the first measurement of σ(gg→tt̄)/ σ(pp̄→tt̄). We use 0.96fb-1 of s=1.96TeV pp̄ collision data recorded with the CDF II detector at Fermilab. Using charged particles with low transverse momentum in tt̄ events, we find σ(gg→ tt̄)/σ(pp̄→tt̄)=0.07±0.14(st ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · August 15, 2008
We present a search for standard model Higgs boson production in association with a W boson in proton-antiproton collisions (pp̄→ W±H→ νbb̄) at a center of mass energy of 1.96 TeV. The search employs data collected with the CDF II detector which correspond t ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · June 5, 2008
We describe a measurement of the W boson mass mW using 200pb-1 of s=1.96TeV pp̄ collision data taken with the CDF II detector. With a sample of 63964 W→eν candidates and 51128 W→μν candidates, we measure mW=[80.413±0.034(stat)±0.034(sys)=80.413±0.048]GeV/c2 ...
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Journal ArticlePhysical review letters · March 2008
We have performed a search for B(s)(0) --> micro(+) micro(-) and B(0) --> micro(+) micro(-) decays in pp collisions at square root s = 1.96 TeV using 2 fb(-1) of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron Collider. The ...
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Journal ArticlePhysical review letters · March 2008
We present the first measurement of the production cross section of a W boson with a single charm quark (c) in pp collisions at sqrt(s)=1.96 TeV, using soft muon tagging of c jets. In a data sample of approximately 1.8 fb(-1), recorded with the Collider De ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 31, 2008
We present a measurement of the cross section for W-boson production in association with jets in pp̄ collisions at s=1.96TeV. The analysis uses a data sample corresponding to an integrated luminosity of 320pb-1 collected with the CDF II detector. W bosons a ...
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Journal ArticlePhys. Rev. · 2008
This paper describes the first measurement of b-quark fragmentation fractions into bottom hadrons in Run II of the Tevatron Collider at Fermilab. The result is based on a 360 pb-1 sample of data collected with the CDF II detector in $p\bar{p}$ collisions a ...
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Journal ArticlePhys. Rev. · 2008
We present a search for the associated production of charginos and neutralinos in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV. The data were collected at the Collider Detector at Fermilab (CDF II) and correspond to integrated luminosities between 0.7 and ...
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Journal ArticlePhys. Rev. · 2008
We search for a third generation vector leptoquark (VLQ3) that decays to a $b$ quark and tau lepton using the CDF II detector and 320 pb-1 of integrated luminosity from the Fermilab Tevatron. Observing a number of events in agreement with standard model ex ...
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Journal ArticlePhys. Rev. · 2008
We present the first observation and cross section measurement of exclusive dijet production in [overline p]p interactions, [overline p]p-->[overline p]+dijet+p. Using a data sample of 310 pb-1 collected by the Run II Collider Detector at Fermilab at $\sqr ...
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Journal ArticlePhys. Rev. · 2008
We present a measurement of the inclusive jet cross section in $p \bar{p}$ collisions at $\sqrt{s}=1.96$ TeV based on data collected by the CDF II detector with an integrated luminosity of 1.13 fb-1. The measurement was made using the cone-based midpoint j ...
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Journal ArticlePhys. Rev. · 2008
We report the results of a search for the anomalous production of a massive particle decaying to four electrons via two Z0 bosons in 1.1 fb-1 of $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV collected by the CDF II detector at Fermilab. We employ optimized ...
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Journal ArticlePhys. Rev. · 2008
We present the first measurement of two-particle momentum correlations in jets produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV. Results are obtained for charged particles within a restricted cone with an opening angle of 0.5 radians around the jet ...
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Journal ArticlePhys. Rev. · 2008
We search for evidence of resonant top quark pair production in 955 pb-1 of $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV recorded with the CDF II detector at the Fermilab Tevatron. For fully reconstructed candidate $t\bar{t}$ events triggered on leptons wi ...
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Journal ArticlePhys. Rev. · 2008
We present a measurement of the shapes of b-jets using 300 pb-1 of data obtained with the upgraded Collider Detector at Fermilab (CDF II) in $p \bar{p}$ collisions at center-of-mass energy $\sqrt{s}=1.96$ TeV. This measurement covers a wide transverse mome ...
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Journal ArticlePhys. Rev. · 2008
We present a measurement of the correlated b[overline b] production cross section. The data used in this analysis were taken with the upgraded CDF detector (CDF II) at the Fermilab Tevatron collider, and correspond to an integrated luminosity of 742 pb-1. ...
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Journal ArticlePhys. Rev. · 2008
We present the results of the first hadron collider search for heavy, long-lived neutralinos that decay via chi-tilde10-->gammaG-tilde in gauge-mediated supersymmetry breaking models. Using an integrated luminosity of 570\pm 34 pb-1 of $p\bar{p}$ collision ...
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Journal ArticlePhys. Rev. Lett. · 2008
We present measurements of the forward-backward charge asymmetry in top pair production using 1.9 fb-1 of $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV recorded with the Collider Detector at Fermilab II. Correcting for acceptance and measurement dilutions w ...
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Journal ArticlePhys. Rev. Lett. · 2008
We report the observation of two narrow resonances consistent with states of orbitally excited (L=1) Bs mesons using 1 fb-1 of $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV collected with the Collider Detector at Fermilab II detector at the Fermilab Tevatro ...
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Journal ArticlePhys. Rev. Lett. · 2008
This Letter describes the first determination of bounds on the CP-violation parameter 2betas using Bs0 decays in which the flavor of the bottom meson at production is identified. The result is based on approximately 2000 Bs0-->J/psiphi decays reconstructed ...
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Journal ArticlePhys. Rev. Lett. · 2008
We report on a search for narrow-width particles decaying to a top and antitop quark pair. The data set used in the analysis corresponds to an integrated luminosity of 680 pb-1 collected with the Collider Detector at Fermilab in run II. We present 95% conf ...
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Journal ArticlePhys. Rev. Lett. · 2008
We measure the mean lifetime ${\tau=2/(\Gamma_L+\Gamma_H)}$ and the decay-width difference ${\Delta\Gamma=\Gamma_L-\Gamma_H}$ of the light and heavy mass eigenstates of the ${B_s^0}$ meson, ${B_{sL}^0}$ and ${B_{sH}^0}$, in ${B_s^0\to J/\psi\phi}$ decays u ...
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Journal ArticlePhysical Review Letters · 2008
The Bc± meson is observed through the decay Bc±→J/ ψπ±, in data corresponding to an integrated luminosity of 2.4fb-1 recorded by the Collider Detector at Fermilab II detector at the Fermilab Tevatron. A signal of 108±15 candidates is observed, with a signi ...
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Journal ArticlePhys. Rev. Lett. · 2008
We search for pair production of supersymmetric top quarks (t-tilde1), followed by R-parity violating decay t-tilde1-->taub with a branching ratio beta, using 322 pb-1 of $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV collected by the upgraded Collider Detec ...
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Journal ArticlePhys. Rev. Lett. · 2008
We report the first top-quark mass measurement that uses a cross-section constraint to improve the mass determination. This measurement is made with a dilepton $t\bar{t}$ event candidate sample collected with the Collider Detector II at Fermilab. From a da ...
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Journal ArticlePhys. Rev. Lett. · 2008
We report the first evidence of Z boson pair production at a hadron collider with a significance exceeding 4 standard deviations. This result is based on a data sample corresponding to 1.9 fb-1 of integrated luminosity from $p\bar{p}$ collisions at $\sqrt{ ...
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Journal ArticlePhys. Rev. Lett. · 2008
We report the observation of two narrow resonances consistent with states of orbitally excited (L=1) Bs mesons using 1 fb-1 of $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV collected with the Collider Detector at Fermilab II detector at the Fermilab Tevatro ...
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Journal ArticlePhys. Rev. Lett. · 2008
We measure the time dependence of the ratio of decay rates for the rare decay D0-->K+pi- to the Cabibbo-favored decay D0-->K-pi+. A signal of 12.7×103 D0-->K+pi- decays was obtained using the Collider Detector at Fermilab II detector at the Fermilab Tevatr ...
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Journal ArticlePhys. Rev. Lett. · 2008
We report the observation of the exclusive decay Bs0-->Ds-Ds+ at the 7.5 standard deviation level using 355 pb-1 of data collected by the CDF II detector in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV at the Fermilab Tevatron. We measure the relative bran ...
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Journal ArticlePhys. Rev. Lett. · 2008
We present the results of searches for large extra dimensions in samples of events with large missing transverse energy E-slash T and either a photon or a jet produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV collected with the Collider Detector at ...
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Journal ArticlePhys. Rev. Lett. · 2008
We search for the standard model Higgs boson produced in association with an electroweak vector boson in events with no identified charged leptons, large imbalance in transverse momentum, and two jets where at least one contains a secondary vertex consiste ...
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Journal ArticlePhys. Rev. Lett. · 2008
We present the results of a search for pair production of a new heavy toplike quark t[prime] decaying to a ${W}$ boson and another quark using the Collider Detector at Fermilab II detector in run II of the Tevatron $p\bar{p}$ collider. Using a data sample ...
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Journal ArticlePhys. Rev. Lett. · 2008
We search for pair production of doubly charged Higgs particles ($H^{\pm\pm}$) followed by decays into electron-tau (etau) and muon-tau (mu tau) pairs using data (350 pb-1) collected from $\bar{p} p$ collisions at $\sqrt{s}=1.96$ TeV by the CDF II experime ...
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Journal ArticlePhys. Rev. · 2008
Data collected in run II of the Fermilab Tevatron are searched for indications of new electroweak scale physics. Rather than focusing on particular new physics scenarios, CDF data are analyzed for discrepancies with respect to the standard model prediction ...
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Journal ArticlePhys. Rev. · 2008
We present a new method for studying high-pT dilepton events $(e^\pm e^{-/+}, \mu^\pm \mu^{-/+}, e^\pm\mu^{-/+})$ and simultaneously extracting the production cross sections of $p\bar{p}$-->$t\bar{t}$, $p\bar{p}$-->W+W-, and $p\bar{p}$-->Z0-->tau+tau- at a ...
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Journal ArticlePhysical Review Letters · 2008
We report a measurement of the single-top-quark production cross section in 2.2 fb-1 of pp̅ collision data collected by the Collider Detector at Fermilab at sqrt[s]=1.96 TeV. Candidate events are classified as signal-like by three parallel analyses which ...
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Journal ArticlePhys. Rev. Lett. · 2008
Inclusive jet cross sections in Z/gamma* events, with Z/gamma* decaying into an electron-positron pair, are measured as a function of jet transverse momentum and jet multiplicity in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV with the upgraded Collider De ...
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Journal ArticlePhysical Review Letters · 2008
We present a search for the Higgs boson in the process qq̅ →ZH→ℓ+ℓ-bb̅ . The analysis uses an integrated luminosity of 1 fb-1 of pp̅ collisions produced at sqrt[s]=1.96 TeV and accumulated by the upgraded Collider Detector at Fermilab (CDF II). We employ a ...
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Journal ArticlePhysical Review Letters · 2008
We use the three lepton and missing energy trilepton signature to search for chargino-neutralino production with 2.0 fb-1 of integrated luminosity collected by the CDF II experiment at the Tevatron pp̅ collider. We expect an excess of approximately 11 sup ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · December 27, 2007
We present a search for anomalous triple gauge couplings (ATGC) in WW and WZ boson production. The boson pairs are produced in pp̄ collisions at s=1.96TeV, and the data sample corresponds to 350pb-1 of integrated luminosity collected with the CDF II detecto ...
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Journal ArticlePhysical review letters · December 2007
We have searched for exclusive gammagamma production in proton-antiproton collisions at sqrt[s]=1.96 TeV, using 532 pb(-1) of integrated luminosity taken by the run II Collider Detector at Fermilab. The event signature requires two electromagnetic showers, ...
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Journal ArticlePhysical review letters · November 2007
We report an observation of new bottom baryons produced in pp collisions at the Tevatron. Using 1.1 fb(-1) of data collected by the CDF II detector, we observe four Lambda b 0 pi+/- resonances in the fully reconstructed decay mode Lambda b 0-->Lambda c + p ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · June 8, 2007
We report on measurements of the inclusive jet production cross section as a function of the jet transverse momentum in pp̄ collisions at s=1.96TeV, using the kT algorithm and a data sample corresponding to 1.0fb-1 collected with the Collider Detector at Fe ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · May 18, 2007
We present a measurement of the inclusive production cross section for Z bosons decaying to tau leptons in pp̄ collisions at s=1.96TeV. We use a channel with one hadronically-decaying and one electronically-decaying tau. This measurement is based on 350pb-1 ...
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Journal ArticlePhysical review letters · March 2007
We present the first observation of the baryon decay Lambda b0-->Lambda c+pi- followed by Lambda c+-->pK-pi+ in 106 pb-1 pp collisions at square root s=1.96 TeV in the CDF experiment. In order to reduce systematic error, the measured rate for Lambda b0 dec ...
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Journal ArticleJ. Phys. G: Nucl. Part. Phys. · 2007
We report the first measurements of inclusive W and Z boson cross-sections times the corresponding leptonic branching ratios for p anti-p collisions at s**(1/2) = 1.96 TeV based on the decays of the W and Z bosons into electrons and muons. The data were re ...
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Journal ArticlePhys. Rev. · 2007
We present a measurement of the top-quark mass in p[overline p] collisions at sqrt(s)=1.96 TeV which uses events with an inclusive signature of missing transverse energy and jets. The event selection is sensitive to t[overline t]-->W+bW-[overline b]-->lnub ...
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Journal ArticlePhys. Rev. Lett. · 2007
We present a measurement of sigma(p[overline p]-->W){\AA}~[script B](W-->enu) at sqrt(s)=1.96 TeV, using electrons identified in the forward region (1.2-90+95(syst)$\pm$162(lum) pb. Combining this result with a previous CDF measurement obtained using elect ...
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Journal ArticlePhys. Rev. · 2007
We present a new measurement of the B+ meson differential cross section dsigma/dpT at sqrt(s)=1960 GeV. The data correspond to an integrated luminosity of 739 pb-1 collected with the upgraded CDF detector (CDF II) at the Fermilab Tevatron collider. B+ cand ...
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Journal ArticlePhys. Rev. Lett. · 2007
We present a measurement of the mass of the top quark from proton-antiproton collisions recorded at the CDF experiment in Run II of the Fermilab Tevatron. We analyze events from the single lepton plus jets final state (t[overline t]-->W+bW-[overline b]-->l ...
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Journal ArticlePhys. Rev. · 2007
We present the results of a search for W[prime] boson decaying to electron-neutrino pairs in p[overline p] collisions at a center-of-mass energy of 1.96 TeV, using a data sample corresponding to 205 pb-1 of integrated luminosity collected by the CDF II det ...
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Journal ArticlePhys. Rev. · 2007
We present the results of a search for new particles that lead to a Z boson plus jets in p[overline p] collisions at sqrt(s)=1.96 TeV using the Collider Detector at Fermilab (CDF II). A data sample with a luminosity of 1.06 fb-1 collected using Z boson dec ...
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Journal ArticlePhys. Rev. · 2007
We report the first measurement of the top quark mass using the decay length technique in p[overline p] collisions at a center-of-mass energy of 1.96 TeV. This technique uses the measured flight distance of the b hadron to infer the mass of the top quark i ...
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Journal ArticlePhys. Rev. Lett. · 2007
We describe a search for anomalous production of events with two leptons (e or µ) of the same electric charge in p[overline p] collisions at a center-of-mass energy of 1.96 TeV. Many extensions to the standard model predict the production of two leptons of ...
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Journal ArticlePhysical Review Letters · 2007
We measure the ratio of cross section times branching fraction, Rp=σχc2B(χc2→J/ψγ)/σχc1B(χc1→J/ ψγ), in 1.1fb-1 of pp̄ collisions at s=1.96TeV. This measurement covers the kinematic range pT(J/ψ)>4.0GeV/c, η(J/ψ)<1.0, and pT(γ)>1.0GeV/c. For events ...
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Journal ArticlePhysical Review Letters · 2007
We have measured the polarizations of J/ψ and ψ(2S) mesons as functions of their transverse momentum pT when they are produced promptly in the rapidity range |y|<0.6 with pT 5GeV/c. The analysis is performed using a data sample with an integrated lumino ...
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Journal ArticlePhys. Rev. Lett. · 2007
We report the results of a search for a narrow resonance in electron-positron events in the invariant mass range of 150--950 GeV/c2 using 1.3 fb-1 of p[overline p] collision data at sqrt(s)=1.96 TeV collected by the CDF II detector at Fermilab. No signific ...
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Journal ArticlePhys. Rev. Lett. · 2007
We present the first observation of exclusive e+e- production in hadron-hadron collisions, using p[overline p] collision data at sqrt(s)=1.96 TeV taken by the run II Collider Detector at Fermilab, and corresponding to an integrated luminosity of 532 pb-1. ...
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Journal ArticlePhys. Rev. · 2007
We present a measurement of the fractions F0 and F+ of longitudinally polarized and right-handed W bosons in top-quark decays using data collected with the CDF II detector. The data set used in the analysis corresponds to an integrated luminosity of approx ...
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Journal ArticlePhys. Rev. · 2007
A search for a manifestly exotic S=-2 baryon state decaying to Xi-pi-, and its neutral partner decaying to Xi-pi+, has been performed using 220 pb-1 of p[overline p] collisions at sqrt(s)=1.96 TeV collected by the Collider Detector at Fermilab. The Xi- tra ...
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Journal ArticlePhys. Rev. Lett. · 2007
We report a search for the anomalous production of events with multiple charged leptons in p[overline p] collisions at sqrt(s)=1.96 TeV using a data sample corresponding to an integrated luminosity of 346 pb-1 collected by the CDF II detector at the Fermil ...
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Journal ArticlePhysical Review Letters · 2007
Using 355pb-1 of data collected by the CDF II detector in pp̄ collisions at s=1.96TeV at the Fermilab Tevatron, we study the fully reconstructed hadronic decays B(s)0→D(s)-π+ and B(s)0→D(s)- π+π+π-. We present the first measurement of the ratio of branching ...
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Journal ArticlePhys. Rev. Lett. · 2007
We report the first observation of the associated production of a W boson and a Z boson. This result is based on 1.1 fb-1 of integrated luminosity from p[overline p] collisions at sqrt(s)=1.96 TeV collected with the CDF II detector at the Fermilab Tevatron ...
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Journal ArticlePhys. Rev. Lett. · 2007
We present a measurement of the top-quark mass Mtop in the all-hadronic decay channel t[overline t]-->W+bW-[overline b]-->q1[overline q]2bq3[overline q]4[overline b]. The analysis is performed using 310 pb-1 of sqrt(s)=1.96 TeV p[overline p] collisions col ...
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Journal ArticlePhys. Rev. Lett. · 2007
We present an analysis of angular distributions and correlations of the X(3872) particle in the exclusive decay mode X(3872)-->J/psipi+pi- with J/psi-->µ+µ-. We use 780 pb-1 of data from p[overline p] collisions at sqrt(s)=1.96 TeV collected with the CDF I ...
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Journal ArticlePhys. Rev. Lett. · 2007
We report the observation and measurement of the mass of the bottom, strange baryon Xib- through the decay chain Xib--->J/psiXi-, where J/psi-->µ+µ-, Xi--->Lambdapi-, and Lambda-->ppi-. A signal is observed whose probability of arising from a background fl ...
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Journal ArticlePhys. Rev. · 2007
We report the measurements of the t[overline t] production cross section and of the top quark mass using 1.02 fb-1 of p[overline p] data collected with the CDF II detector at the Fermilab Tevatron. We select events with six or more jets on which a number o ...
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Journal ArticlePhysical Review Letters · 2007
We report a measurement of the Λb0 lifetime in the exclusive decay Λb0→J/ψΛ0 in pp̄ collisions at s=1.96TeV using an integrated luminosity of 1.0fb-1 of data collected by the CDF II detector at the Fermilab Tevatron. Using fully reconstructed decays, we mea ...
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Journal ArticlePhys. Rev. Lett. · 2007
We present the first search for heavy, long-lived particles that decay to photons at a hadron collider. We use a sample of gamma+jet+missing transverse energy events in p[overline p] collisions at sqrt(s)=1.96 TeV taken with the CDF II detector. Candidate ...
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Journal ArticlePhys. Rev. Lett. · 2007
We report an upper limit on the fraction of V+A current, fV+A, in top-quark decays, using approximately 700 pb-1 of p[overline p] collisions at sqrt(s)=1.96 TeV acquired by the upgraded Collider Detector at Fermilab. For the decay t-->Wb-->[script-l]nub (w ...
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Journal ArticlePhys. Rev. Lett. · 2007
e have performed a search for new particles which decay to two photons using 1.2 fb-1 of integrated luminosity from p[overline p] collisions at sqrt(s)=1.96 TeV collected using the CDF II detector at the Fermilab Tevatron. We find the diphoton mass spectru ...
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Journal ArticlePhys. Rev. Lett. · 2007
We present a search for associated production of the chargino and neutralino supersymmetric particles using up to 1.1 fb-1 of integrated luminosity collected by the CDF II experiment at the Tevatron p[overline p] collider at sqrt(s)=1.96 TeV. We analyze ev ...
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Journal ArticlePhys. Rev. · 2007
We search for direct pair production of supersymmetric top quarks and supersymmetric bottom quarks in proton-antiproton collisions at sqrt(s)=1.96 TeV, using 295 pb-1 of data recorded by the Collider Detector at Fermilab (CDF II) experiment. The supersymme ...
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Journal ArticlePhys. Rev. · 2007
We report a measurement of the top-quark mass, Mt, in the dilepton decay channel of t[overline t]-->b[script-l][prime]+nu[script-l][prime][overline b][script-l]-[overline nu ][script-l] using an integrated luminosity of 1.0 fb-1 of p[overline p] collisions ...
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Journal ArticlePhys. Rev. Lett. · 2007
We present a measurement of the W-boson mass using 200 pb-1 of data collected in p[overline p] collisions at sqrt(s)=1.96 TeV by the CDF II detector at run II of the Fermilab Tevatron. With a sample of 63 964 W-->enu candidates and 51 128 W-->µnu candidate ...
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Journal ArticlePhysics Letters Section B Nuclear Elementary Particle and High Energy Physics · August 10, 2006
We present a search for t over(t, ̄) events with a tau lepton in the final state. The data sample corresponds to an integrated luminosity of 194 pb-1 collected with the CDF II detector from p over(p, ̄) collisions at a center of mass energy of 1.9 ...
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Journal ArticlePhysical review letters · March 2006
We present a search for Higgs bosons decaying into bb and produced in association with W bosons in pp collisions at square root of s = 1.96 TeV. This search uses 320 pb(-1) of the data set accumulated by the upgraded Collider Detector at Fermilab. Events a ...
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Journal ArticleNuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · January 15, 2006
A new silicon microstrip detector was designed by the CDF collaboration for the proposed high-luminosity operation of the Tevatron pp̄ collider (Run IIb). The detector is radiation-tolerant and will still be functional after exposure to particle fluences of ...
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Journal ArticlePhys. Rev. · 2006
This report describes a measurement of the top quark mass, M_top, with the dynamical likelihood method (DLM) using the CDF II detector at the Fermilab Tevatron. The Tevatron produces top/anti-top (t anti-t) pairs in p anti-p collisions at a center-of-mass ...
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Journal ArticlePhys. Rev. · 2006
A measurement of the inclusive bottom jet cross section is presented for events containing a Z boson in p anti-p collisions at s**(1/2) = 1.96 TeV using the Collider Detector at Fermilab. Z bosons are identified in their electron and muon decay modes, and ...
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Journal ArticlePhys. Rev. Lett. · 2006
We report two measurements of the top quark mass M_top using the CDF II detector at the Fermilab Tevatron in a 318 pb-1 data sample observed in the lepton + jets final state. One method uses an event-based likelihood technique resulting in M_top = 173.2+2. ...
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Journal ArticlePhys. Rev. Lett. · 2006
We searched for scalar bottom quarks in 156 pb-1 of p anti-p collisions at s**(1/2) = 1.96 TeV recorded by the CDF II experiment at the Tevatron. Scalar bottom quarks can be produced from gluino decays in R-parity conserving models of supersymmetry when th ...
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Journal ArticlePhys. Rev. · 2006
We report a measurement of the tt-bar production cross section using the CDF II detector at the Fermilab Tevatron. The analysis is performed using 322 pb-1 of p anti-p collisions at s**(1/2) = 1.96 TeV. The data consist of events selected with six or more ...
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Journal ArticlePhys. Rev. · 2006
We describe a measurement of the top quark mass using events with two charmed leptons collected by the CDF II detector from p anti-p collisions with s**(1/2) = 1.96 TeV at the Fermilab Tevatron. The likelihood in top mass is calculated for each event by co ...
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Journal ArticlePhys. Rev. Lett. · 2006
We measure the masses of $b$ hadrons in exclusively reconstructed final states containing a $J/\psi\to\mu^-\mu^+$ decay using $\rm 220 pb^{-1}$ of data collected by the CDF II experiment. We find: m(B^+) = 5279.10 \pm 0.41_{(stat.)} \pm 0.36_{(sys.)} MeVcc ...
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Journal ArticlePhys. Rev. Lett. · 2006
We report a measurement of the top quark mass using events collected by the CDF II Detector from p anti-p collisions at s**(1/2) = 1.96 TeV at the Fermilab Tevatron. We calculate a likelihood function for the top mass in events that are consistent with t a ...
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Journal ArticlePhysical Review Letters · 2006
We report the first observation of Bs0→ψ(2S) decay in pp̄ collisions at s= 1.96 TeV using 360 pb-1 of data collected by the CDF II detector at the Fermilab Tevatron. We observe 20.2±5.0 and 12.3±4.1 Bs0→ψ(2S) candidates, in ψ(2S)→μ+μ- and ψ(2S)→J/ψπ+π- deca ...
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Journal ArticlePhys. Rev. · 2006
We describe a measurement of the top quark mass from events produced in p anti-p collisions at a center-of-mass energy of 1.96 TeV, using the Collider Detector at Fermilab. We identify tt-bar candidates where both W bosons from the top quarks decay into le ...
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Journal ArticlePhys. Rev. Lett. · 2006
We present results of a search for anomalous production of events containing a charged lepton (either electron or muon) and a photon, both with high transverse momentum, accompanied by additional signatures, X, including missing transverse energy (MET) and ...
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Journal ArticlePhys. Rev. Lett. · 2006
We measure the dipion mass spectrum in X(3872) --> J/psi pi++ pi+- decays using 360 pb-1 of p anti-p collisions at s**(1/2) = 1.96 TeV collected with the CDF II detector. The spectrum is fit with predictions for odd C-parity (3S_1, 1P_1, and 3D_J) charmoni ...
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Journal ArticlePhysical Review Letters · 2006
We present a measurement of the Bc+ meson lifetime in the decay mode Bc+→J/ψe+νe using the Collider Detector at Fermilab II detector at the Fermilab Tevatron Collider. From a sample of about 360pb-1 of pp̄ collisions at s=1.96TeV, we reconstruct J/ψe+ pairs ...
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Journal ArticlePhys. Rev. Lett. · 2006
We measure the masses of $b$ hadrons in exclusively reconstructed final states containing a $J/\psi\to\mu^-\mu^+$ decay using $\rm 220 pb^{-1}$ of data collected by the CDF II experiment. We find: m(B^+) = 5279.10 \pm 0.41_{(stat.)} \pm 0.36_{(sys.)} MeVcc ...
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Journal ArticlePhys. Rev. Lett. · 2006
We report first evidence for a fully reconstructed decay mode of the B+/-_c meson in the channel B+/-_c --> J/psi pi++/-, with J/psi --> mu+ mu-. The analysis is based on an integrated luminosity of 360 pb-1 in p anti-p collisions at 1.96 TeV center of mas ...
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Journal ArticlePhys. Rev. · 2006
We report on precision measurements of the masses and widths of the narrow, orbitally excited states D0_1 and D*0_2 using the CDF II detector at the Fermilab Tevatron. Both states (collectively called D**) are reconstructed in the decay channel D** --> D*+ ...
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Journal ArticlePhysical Review Letters · 2006
We report an observation of the decay Bs0→Ds-π+ in pp̄ collisions at s=1.96TeV using 115pb-1 of data collected by the CDF II detector at the Fermilab Tevatron. We observe 83±11(stat) Bs0→Ds-π+ candidates, representing a large increase in statistics over pre ...
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Journal ArticlePhys. Rev. Lett. · 2006
We present a measurement of the tt-bar production cross section in p anti-p collisions at s**(1/2) = 1.96 TeV which uses events with an inclusive signature of significant missing transverse energy and jets. This is the first measurement which makes no expl ...
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Journal ArticlePhys. Rev. Lett. · 2006
We report results from a search for Z' bosons in high-mass dielectron events produced in p anti-p collisions at s**(1/2) = 1.96 TeV. The data were recorded with the CDF II detector at the Fermilab Tevatron and correspond to an integrated luminosity of 0.45 ...
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Journal ArticlePhys. Rev. · 2006
This article presents a measurement of the top quark mass using the CDF II detector at Fermilab. Colliding beams of protons and anti-protons at Fermilab's Tevatron (s**(1/2) = 1.96 TeV) produce top/anti-top pairs, which decay to W+ W- bb-bar; events are se ...
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Journal ArticlePhys. Rev. Lett. · 2006
We search for pair-produced Dirac magnetic monopoles in 35.7 pb-1 of proton-antiproton collisions at s**(1/2) = 1.96 TeV with the Collider Detector at Fermilab (CDF). We find no monopole candidates corresponding to a 95\% confidence-level cross-section lim ...
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Journal ArticlePhys. Rev. · 2006
Results on a search for pair production of second generation scalar leptoquark in p anti-p collisions at s**(1/2) = 1.96 TeV are reported. The data analyzed were collected by the CDF detector during the 2002-2003 Tevatron Run II and correspond to an integr ...
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Journal ArticlePhys. Rev. Lett. · 2006
We report on a measurement of the inclusive jet production cross section in p anti-p collisions at s**(1/2) = 1.96 TeV using data collected with the upgraded Collider Detector at Fermilab in Run II (CDF II) corresponding to an integrated luminosity of 385 ...
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Journal ArticlePhys. Rev. Lett. · 2006
We describe a general search for resonances decaying to a neutral e mu final state in p anti-p collisions at a center-of-mass energy of 1.96 TeV. Using a data sample representing 344 pb-1 of integrated luminosity recorded by the CDF II experiment, we compa ...
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Journal ArticlePhys. Rev. Lett. · 2006
We present the results of a search for new physics in the jets plus missing transverse energy data sample collected from 368 pb-1 of p anti-p collisions at s**(1/2) = 1.96 TeV recorded by the Collider Detector at Fermilab. We compare the number of events o ...
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Journal ArticlePhys. Rev. · 2006
We present a search for anomalous semileptonic decays of heavy flavor hadrons produced in association with a W boson, in proton-antiproton collisions at s**(1/2) = 1.96 TeV. We use 162 pb-1 of data collected with the CDF II detector at the Fermilab Tevatro ...
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Journal ArticlePhysical Review Letters · 2006
We report the observation of B s0- B̄ s0 oscillations from a time-dependent measurement of the B s0-B̄ s0 oscillation frequency Δm s. Using a data sample of 1 fb -1 of pp collisions at √ = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron, ...
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Journal ArticlePhys. Rev. Lett. · 2006
We report the results of a search for a charged Higgs boson in the decays of top quarks produced in p anti-p collisions at a center-of-mass energy of 1.96 GeV. We use a data sample corresponding to an integrated luminosity of 193 pb-1 collected by the upgr ...
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Journal ArticlePhysical Review Letters · 2006
We search for excited and exotic muon states * using an integrated luminosity of 371pb-1 of pp collision data at s=1.96TeV. We search for associated production of * followed by the decay *. We compare the data to model predictions as a function of the mass ...
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Journal ArticlePhys. Rev. · 2006
We present a measurement of the inclusive jet cross section in ppbar interactions at sqrt{s}=1.96 TeV using 385 pb^{-1} of data collected with the CDF II detector at the Fermilab Tevatron. The results are obtained using an improved cone-based jet algorithm ...
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Journal ArticlePhys. Rev. Lett. · 2006
We present the results of a search for standard model Higgs boson production with decay to WW*, identified through the leptonic final states e+e-nu-bar nu, e+/- mu-/+ nu-bar nu and mu+ mu- nu-bar nu. This search uses 360 pb-1 of data collected from p anti- ...
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Journal ArticlePhys. Rev. Lett. · 2006
We search for decays of the type B(s)0-->h+h[prime]- (where h,h[prime]=K or pi) in 180 pb-1 of [overline p]p collisions collected at the Tevatron by the upgraded Collider Detector at Fermilab. We report the first observation of the new mode Bs0-->K+K- with ...
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Journal ArticlePhysical review letters · January 2006
We present a search for neutral supersymmetric Higgs bosons decaying to tau pairs produced in pp collisions at square root of s = 1.96 TeV. The data, corresponding to 310 pb(-1) integrated luminosity, were collected with the Collider Detector at Fermilab i ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2006
We present a study of the dijet invariant mass distribution for the reaction p̄p→twojets+γ+X, at a center of mass energy of 1.8 TeV, using data collected by the CDF experiment. We compare the data to predictions for the production of a photon with two jets, ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2006
We present a measurement of RB, the ratio of the branching fraction for the rare decay D0→K+π- to that for the Cabibbo-favored decay D0→K-π+. Charge-conjugate decays are implicitly included. A signal of 2005±104 events for the decay D0→K+π- is obtained usi ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · October 1, 2005
A search for the direct production of Higgs bosons in the di-tau decay mode is performed with 86.3±3.5pb-1 of data collected with the Collider Detector at Fermilab during the 1994-1995 data taking period of the Tevatron. We search for events where one tau ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · September 1, 2005
We present a study of the production of KS0 and Λ0 in inelastic pp̄ collisions at s=1800 and 630 GeV using data collected by the CDF experiment at the Fermilab Tevatron. Analyses of KS0 and Λ0 multiplicity and transverse momentum distributions, as well as o ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · June 1, 2005
We report on a search for the pair production of scalar leptoquarks (LQ), using 191pb-1 of proton-antiproton collision data recorded by the CDF experiment during Run II of the Tevatron. The leptoquarks are sought via their decay into a neutrino and quark y ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · May 1, 2005
We present a search for ZZ and ZW vector boson pair production in pp̄ collisions at s=1.96TeV using the leptonic decay channels ZZ→llνν, ZZ→lll′l′, and ZW→lll′ν. In a data sample corresponding to an integrated luminosity of 194pb-1 collected with the Collid ...
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Journal ArticlePhysical review letters · March 2005
We present measurements of the lifetimes and polarization amplitudes for B(0)(s)-->J/psiphi and B(0)(d)-->J/psiK(*0) decays. Lifetimes of the heavy and light mass eigenstates in the B(0)(s) system are separately measured for the first time by determining t ...
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Journal ArticlePhysical review letters · March 2005
We present a search for excited and exotic electrons (e(*)) decaying to an electron and a photon, both with high transverse momentum. We use 202 pb(-1) of data collected in pp collisions at sqrt[s] = 1.96 TeV with the Collider Detector at Fermilab II detec ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · March 1, 2005
We present a measurement of the tt̄ production cross section using events with one charged lepton and jets from pp̄ collisions at a center-of-mass energy of 1.96 TeV. In these events, heavy flavor quarks from top quark decay are identified with a secondary v ...
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Journal ArticlePhysical Review Letters · February 4, 2005
The standard model predictions for Wγ and Z γ production are tested using an integrated luminosity of 200 pb-1 of pp̄ collision data collected at the Collider Detector at Fermilab. The cross sections are measured by selectin ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2005
We report on a search for standard model t-channel and s-channel single-top quark production in pp̄ collisions at a center of mass energy of 1.96 TeV. We use a data sample corresponding to 162 pb-1 recorded by the upgraded collider detector at Fermilab. We ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2005
We present a new measurement of the inclusive and differential production cross sections of J/ψ mesons and b hadrons in proton-antiproton collisions at √s = 1960 GeV. The data correspond to an integrated luminosity of 39.7 pb-1 collected by the CDF run II ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2005
The polarization of the W boson in t →Wb decay is unambiguously predicted by the standard model of electroweak interactions and is a powerful test of our understanding of the tbW vertex. We measure this polarization from the invariant mass of the b quark f ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2005
The properties of three-jet events with total transverse energy greater than 320 GeV and individual jet energy greater than 20 GeV have been analyzed and compared to absolute predictions from a next-to-leading order (NLO) perturbative QCD calculation. Thes ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2005
We report a measurement of the tt̄ production cross section using the CDF II detector at the Fermilab Tevatron. The data consist of events with an energetic electron or muon, missing transverse energy, and three or more hadronic jets, at least one of which ...
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Journal ArticlePhysical Review Letters · 2005
We present a measurement of relative partial widths and decay rate CP asymmetries in K- K+ and π-π+ decays of D0 mesons produced in pp̄ collisions at,√s = 1.96 TeV. We use a sample of 2 × 105 D*+ →D0π+ (and charge conjugate) decays with the D0 decaying to K ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2005
Using 180 pb -1 of data collected with the CDF II detector at the Tevatron, we measure the first two moments of the hadronic invariant mass-squared distribution in charmed semileptonic B decays. From these we determine the nonperturbative Heavy Quark Effec ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2005
We present a measurement of the tt̄ production cross section using 194 pb-1 of CDF II data using events with a high transverse momentum electron or muon, three or more jets, and missing transverse energy. The measurement assumes 100% t→Wb branching fraction ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2005
We have measured the azimuthal angular correlation of bb̄ production, using 86.5pb-1 of data collected by Collider Detector at Fermilab (CDF) in pp̄ collisions at s=1.8TeV during 1994-1995. In high-energy pp̄ collisions, such as at the Tevatron, bb̄ production ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2005
We report a measurement of the forward-backward charge asymmetry of electrons from W boson decays in pp̄ collisions at √s=1.96 TeV using a data sample of 170 pb-1 collected by the Collider Detector at Fermilab. The asymmetry is measured as a function of ele ...
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Journal ArticlePhysical Review Letters · October 2004
We report results from a study of events with a double-
Pomeron exchange topology produced in p-barp
collisions at sqrt[s]=1800 GeV. The events are
characterized by a leading antiproton and a large rapidity
gap on the outgoing proton side. We find that ...
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Journal ArticlePhysical Review · October 2004
0.9 using data collected between 1994 and 1995 by the
Collider Detector at Fermilab (CDF). The measurement is
based on events where the photon converts into an
electron-positron pair in the material of the inner
detector, resulting in a two track event ...
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Journal ArticlePhysical Review · October 2004
For comparison of inclusive jet cross
sections measured at
hadron-hadron colliders to next-to-leading
order (NLO)
parton-level calculations, the energy
deposited in the jet
cone by spectator parton interactions must
first be
subtracted. The assumption ...
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Journal ArticlePhysical Review Letters · October 2004
We report a measurement of the tt-bar production cross
section using dilepton events with jets and missing
transverse energy in pp-bar collisions at a center-of-
mass energy of 1.96 TeV. Using a 197±12 pb-1 data
sample recorded by the upgraded Collider ...
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Journal ArticleIEEE Transactions on Nuclear Science · October 1, 2004
The various generations of Silicon Vertex Detectors (SVX, SVX', SVXII) for Collider Detector at Fermilab (CDF) at the Fermilab Tevatron have been fundamental tools for heavy-flavor tagging via secondary vertex detection. The CDF Run IIb Silicon Vertex Dete ...
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Journal ArticleIEEE Transactions on Nuclear Science · October 1, 2004
The innermost layer (L00) of the Run IIa silicon detector of CDF was planned to be replaced for the high luminosity Tevatron upgrade of Run IIb. This new silicon layer (L0) is designed to be a radiation tolerant replacement for the otherwise very similar L ...
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Journal ArticlePhysical Review Letters · August 2004
We report on a search for anomalous production of events
with at least two charged, isolated, like-sign leptons, each
with pT>11 GeV/c using a 107 pb-1 sample of 1.8 TeV
pp-bar collisions collected by the CDF detector. We define
a signal region contain ...
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Journal ArticleIEEE Transactions on Nuclear Science · August 1, 2004
We describe the characteristics of silicon microstrip sensors fabricated by Hamamatsu Photonics for the CDF Run 2b silicon detector. A total of 953 sensors, including 117 prototype sensors, have been produced and tested. Five sensors were irradiated with n ...
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Journal ArticlePhysical Review Letters · July 2004
We report on a search for B0s-->µ+µ- and B0d-->µ+µ-
decays in pp-bar collisions at sqrt[s]=1.96 TeV using 171
pb-1 of data collected by the CDF II experiment at the
Fermilab Tevatron Collider. The decay rates of these rare
processes are sensitive to co ...
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Journal ArticlePhysical review letters · July 2004
We report on a search for B(0)(s)-->micro(+)micro(-) and B(0)(d)-->micro(+)micro(-) decays in pp collisions at square root of s=1.96 TeV using 171 pb(-1) of data collected by the CDF II experiment at the Fermilab Tevatron Collider. The decay rates of these ...
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Journal ArticleIEEE Transactions on Nuclear Science · June 1, 2004
The main building block and readout unit of the planned CDF Run lib silicon detector is a "stave," a highly integrated mechanical, thermal, and electrical structure. One of its characteristic features is a copper-on-Kapton flexible cable for power, high vo ...
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Journal ArticlePhys. Rev. · April 2004
We present a detailed examination of the heavy flavor properties
of jets produced at the Fermilab Tevatron collider. The data set, collected
with the Collider Detector at Fermilab, consists of events with two or more
jets with transverse energy ET >= ...
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Journal ArticlePhysical Review Letters · March 2004
We report on a search for direct Kaluza-Klein graviton
production in a data sample of 84 pb-1 of pp-bar
collisions at sqrt[s]=1.8 TeV, recorded by the Collider
Detector at Fermilab. We investigate the final state of
large missing transverse energy and ...
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Journal ArticlePhys. Rev. · March 2004
We use a neural-network technique to search for standard model
single-top-quark production in the 106Êpb-1 dataset accumulated by the Collider
Detector at Fermilab detector during the 1992Ð1995 collider run (``run I'').
Using a sample of 64 W+1, 2, 3 ...
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Journal ArticleNuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · February 1, 2004
Fermilab plans to deliver 5-15fb-1 of integrated luminosity to the CDF and D0 experiments. The current inner silicon detectors at CDF (SVXIIa and L00) will not tolerate the radiation dose associated with high-luminosity running and will need to ...
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Journal ArticlePhysical review letters · February 2004
We present the results of a search for pair production of scalar top quarks (t(1)) in an R-parity violating supersymmetry scenario in 106 pb(-1) of pp collisions at square root of s=1.8 TeV collected by the Collider Detector at Fermilab. In this mode each ...
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Journal ArticlePhysical Review Letters · 2004
The observation of a state consistent with X(3872) decaying into J/ψπ+π- was reported. The X(3872) mass was measured to be 3871.3±0.7(stat)±0.4(syst)MeV/c2 from a sample of 730±90 candidates. The observed width was consistent with the detector resolution. ...
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Journal ArticlePhys. Rev. · January 2004
We have measured the number of like-sign (LS) and opposite-sign
(OS) lepton pairs arising from double semileptonic decays of b and b-bar
hadrons, pair produced at the Fermilab Tevatron collider. The data samples
were collected with the Collider Detec ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 2004
The results based on 1992–95 data (Run 1) from the CDF and D0 experiments on the measurements of the [Formula Presented] boson mass and width are presented, along with the combined results. We report a Tevatron collider average [Formula Presented]. We also ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 2004
We present a measurement of the polar-angle distribution of leptons from W boson decay, as a function of the W transverse momentum. The measurement uses an [Formula Presented] sample of [Formula Presented] collisions at [Formula Presented] collected by the ...
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Journal ArticlePhysical Review Letters · December 2003
We report on measurements of differential cross sections d sigma /dpT
for prompt charm meson production in pp-bar collisions at sqrt[s]=1.96
TeV using 5.8±0.3 pb-1 of data from the CDF II detector at the Fermilab
Tevatron. The data are collected with a ...
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Journal ArticlePhysical Review · November 2003
We report on a search for the flavor-changing neutral current decay
D0-->µ+µ- in pp-bar collisions at sqrt[s]=1.96 TeV using 65 pb-1 of
data collected by the CDF II experiment at the Fermilab Tevatron
Collider. A displaced-track trigger selects long-liv ...
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Journal ArticlePhysical Review Letters · October 2003
We report on a search for a high mass, narrow width particle that decays
directly to eµ, e tau , or µ tau . We use approximately 110 pb-1 of data
collected with the Collider Detector at Fermilab from 1992 to 1995. No
evidence of lepton flavor violating ...
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Journal ArticlePhysical Review · October 2003
We present a measurement of the mass difference m(D+s)-m(D+), where
both the D+s and D+ are reconstructed in the phi pi + decay channel.
This measurement uses 11.6 pb-1 of data collected by CDF II using the
new displaced-track trigger. The mass differen ...
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Journal ArticlePhysical Review Letters · July 2003
We report a measurement of the fraction of events with a large
pseudorapidity gap Delta eta within the pseudorapidity region available
to the proton dissociation products X in p-bar+p-->p-bar+X. For a final
state p-bar of fractional momentum loss xi p-b ...
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Journal ArticlePhysical Review · July 2003
Inclusive momentum distributions of charged particles in restricted
cones around jet axes were measured in dijet events with invariant dijet
masses in the range 80 to 600 GeV/c2. Events were produced at the
Fermilab Tevatron in pp-bar collisions with a ...
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Journal ArticlePhysical Review Letters · June 27, 2003
The article discussed about the supersymmetric particles of the top quark in Dilepton events. The Collider Detector at Fermilab was used to gather supersymmetry particles. Due to the high mass, stop decays into the top quark were found kinematically inacce ...
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Journal ArticlePhysical Review Letters · June 2003
We have searched for pair production of the supersymmetric partner of
the top quark (stop) in 107 pb-1 of pp-bar collisions at sqrt[s]=1.8 TeV
collected by the Collider Detector at Fermilab (CDF). Each stop is
assumed to decay into a lepton, bottom quar ...
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Journal ArticlePhysical Review Letters · June 2003
We present a search for associated production of the Upsilon (1S) and a
vector boson in 83 pb-1 of pp-bar collisions at sqrt[s]=1.8 TeV collected
by the CDF experiment in 1994–1995. We find no evidence of the
searched signal in the data, and set upper l ...
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Journal ArticlePhysical Review Letters · May 22, 2003
Associated production of υ and vector boson in pp̄ collisions at √s = 1.8 TeV were investigated. The CDF detector was used in the analysis. The analysis showed that υ(1S) mesons in association with W± or Z0 bosons were not observed by ...
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Journal ArticlePhysical Review Letters · April 2003
We report a search for the production of long-lived charged massive
particles in a data sample of 90 pb-1 of sqrt[s]=1.8 TeV pp-bar
collisions recorded by the Collider Detector at Fermilab. The search uses
the muonlike penetration and anomalously high i ...
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Journal ArticlePhysical Review Letters · February 2003
We report the results of a search for a W' boson produced in pp -bar
collisions at a center-of-mass energy of 1.8 TeV using a 106 pb-1 data
sample recorded by the Collider Detector at Fermilab. We observe no
significant excess of events above background ...
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Journal ArticleNuclear Physics B Proceedings Supplements · January 1, 2003
The current silicon devices being used by the DØ and CDF collaborations for the Tevatron Run 2a, which is expected to end in 2005 after accumulating about 2 fb-1 of data, will need to be replaced due to radiation damage for the following data co ...
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Journal ArticlePhysical Review Letters · 2003
Lepton flavor violating decays of a heavy neutral particle in pp̄ collisions at √s = 1.8 TeV were studied. The position of PP̄ collisions along the beam line was measured in the vertex time projection chamber (VTX). The results show no evidence for new parti ...
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Journal ArticlePhysical Review Letters · December 2002
The exclusive gamma E̸T signal has a small standard model cross
section and is thus a channel sensitive to new physics. This signature is
predicted by models with a superlight gravitino or with large extra
spatial dimensions. We search for such signa ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 11, 2002
In the (Formula presented) jet data collected by Collider Detector at Fermilab during the 1992–1995 Fermilab collider run, 13 events were observed to contain a superjet when (Formula presented) events are expected. A previous article detailed the selection ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2002
We present the results of a search in [Formula Presented] collisions at [Formula Presented] for anomalous production of events containing a photon with large transverse energy and a lepton [Formula Presented] or [Formula Presented] with large transverse en ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2002
We present a search for the flavor-changing neutral current decay Bs→μ+μ-φ in pp̄ collisions at √s = 1.8 TeV, using 91 pb-1 of data collected at the Collider Detector at Fermilab (CDF). We find two candidate events for this decay, which are consistent with ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2002
We present an improved measurement of b-meson lifetimes using fully reconstructed B-decays produced in (Formula presented) collisions at (Formula presented) using (Formula presented) of data collected at the Collider Detector at Fermilab. We obtain (Formul ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2002
We search for standard model single-top-quark production in the W-gluon fusion and (Formula presented) channels using (Formula presented) of data from (Formula presented) collisions at (Formula presented) collected with the Collider Detector at Fermilab. W ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2002
The growth and development of “charged particle jets” produced in proton-antiproton collisions at [Formula Presented] are studied over a transverse momentum range from [Formula Presented] [Formula Presented] to [Formula Presented] [Formula Presented] A var ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2002
We present a study of (Formula presented) collisions at (Formula presented) and 630 GeV collected using a minimum bias trigger by the CDF experiment in which the data set is divided into two classes corresponding to “soft” and “hard” interactions. For each ...
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Journal ArticlePhysical Review Letters · 2002
The diffractive dijet production at √s = 630 and 1800 GeV at the Fermilab Tevatron was presented. The β and ξ dependence of the diffractive structure function at √s = 1800 GeV and it was found that it obeyed β-ξ factorization for β<0.5. Results showed t ...
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Journal ArticlePhysical Review Letters · 2002
The study of the decays B0 → J/ψK(*)0 π+π-, was reported. The study involved the creation of a uū or dd̄ quark pair in addition to a b̄ → c̄(cs̄) decay. Three-level dimuon trigger was used in the analysis. Events with two separate sets of atleast three linked ...
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Journal ArticlePhysical Review Letters · 2002
The general search for new heavy particles, X, was presented. The data collected by the Collider Detector at Fermilab showed no evidence for production of X in 110 pb-1. As a function of mass and width of new particle, the general cross section limits were ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 2002
We have measured the cross sections (Formula presented) for production of isolated direct photons in (Formula presented) collisions at two different center-of-mass energies, 1.8 TeV and 0.63 TeV, using the Collider Detector at Fermilab. The normalization o ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 2002
We have performed a search for radiative b-hadron decays using events produced in [Formula Presented] collisions at [Formula Presented] and collected by the Collider Detector at Fermilab. The decays we considered were [Formula Presented] [Formula Presented ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2002
We present a search for the flavor-changing neutral current decay [Formula Presented] in [Formula Presented] collisions at [Formula Presented] using [Formula Presented] of data collected at the Collider Detector at Fermilab (CDF). We find two candidate eve ...
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Journal ArticlePhysical Review Letters · September 24, 2001
An overview is given on the measurements of dσ/dM and improvement of the existing measurements of AFB. All the measurements have been taken by the Collider Detector at Fermilab (CDF). The measurements of e+e- pairs with inv ...
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Journal ArticlePhysical review letters · September 2001
We report on a measurement of the mass dependence of the forward-backward charge asymmetry, A(FB), and production cross section d sigma/dM for e(+)e(-) pairs with mass M(ee)>40 GeV/c(2). The data sample consists of 108 pb(-1) of pp macro collisions at squa ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · August 16, 2001
We report on a search for the supersymmetric partner of the top quark (top squark) produced in tt̄ events using 110 pb-1 of pp̄ collisions at √s = 1.8 TeV recorded with the Collider Detector at Fermilab. In the case of a light top squark, the decay of the to ...
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Journal ArticlePhysical Review Letters · April 30, 2001
The charmonium system was studied by measuring the relative cross sections of the Xc1 and Xc2 produced in pp collisions at √ s = 1.8 TeV. As a result, the ratio of production cross sections was established. ...
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Journal ArticlePhysical Review D · 2001
We present results of searches for diphoton resonances produced both inclusively and also in association with a vector boson (W or Z) using 100 pb-1 of pp̄ collisions using the CDF detector. We set upper limits on the product of cross section times branchin ...
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Journal ArticlePhysical Review D · 2001
We present a measurement of the W boson mass using data collected with the CDF detector during the 1994-1995 collider run at the Fermilab Tevatron. A fit to the transverse mass spectrum of a sample of 30115 W → ev events recorded in an integrated luminosit ...
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Journal ArticlePhysical Review Letters · 2001
The first observation of diffractive J/ψ(→μ+μ-) production in p̄p collisions at s√=1.8 TeV was presented. Events were selected with a pair of muon candidates using a three-level dimuon trigger system. The dimuon mass distribution was fitted with a sum of a ...
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Journal ArticlePhysical Review Letters · 2001
The mean charged-particle multiplicity of jets in dijet events with dijet masses were analyzed using collider detectors. The jet energy and direction were measured in the central lead-scintillator electromagnetic (CEM) and iron-scintillator hadronic (CHA) ...
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Journal ArticlePhysical Review Letters · 2001
A study on searches for quark-lepton compositeness and a heavy boson at high electron-neutrino transverse mass was presented. The data collected in pp̄ collisions at √s=1.8 TeV was used for the analysis. The data obtained is found to be consistent with the ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2001
We present a study of events with W bosons and hadronic jets produced in p̄p collisions at a center of mass energy of 1.8 TeV. The data consist of 51400 W → e ν decay candidates from 108 pb-1 of integrated luminosity collected using the CDF detector at the ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2001
We report on the first measurement of the rapidity distribution [Formula Presented] over nearly the entire kinematic region of rapidity for [Formula Presented] pairs in both the Z-boson region of [Formula Presented] and in the high mass region of [Formula ...
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Journal ArticlePhysical Review Letters · November 27, 2000
A full angular analysis of both the B0 and Bs0 decay modes was carried out. For this analysis, the B0 → J/ψK*0 and Bs0 → J/ψφ decays were reconstructed. The obtained data were ana ...
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Journal ArticlePhysical Review Letters · October 16, 2000
The W boson width, ΓW obtained in studies of the transverse-mass spectra of leptonic W decays is measured. Through analysis, the W width is determined from a binned log-likelihood fit to the transverse-mass distribution in the region 100 < M
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Journal ArticleNuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · October 11, 2000
The Intermediate Silicon Layers (ISL) detector is currently being built as part of the CDF II detector upgrade project. The ISL detector will significantly improve tracking in the central region and, together with the Silicon Vertex detector, provide stand ...
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Journal ArticlePhysical Review Letters · September 4, 2000
The search for narrow-width vector particles was undertaken using 106 pb-1 data from the collider detector at Fermilab. The cross section upper limits for narrow vector resonances decaying to tt are presented. The existence of leptophobic Z boso ...
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Journal ArticlePhysical review letters · June 2000
We report the results of a search for a W' boson produced in pp collisions at a center-of-mass energy of 1.8 TeV using a 107 pb-1 data sample recorded by the Collider Detector at Fermilab. We consider the decay channel W'-->&munumu and search for anomalous ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2000
We report the first direct measurement of bb̄ rapidity correlations in pp̄ collisions at √=1.8 TeV. We select events with a high transverse momentum muon accompanied by a jet, and a second jet associated with a decay vertex displaced from the pp̄ interaction ...
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Journal ArticlePhysical Review Letters · 2000
We have measured the polarization of J/ψ and ψ(2S) mesons produced in pp̄ collisions at √s = 1.8 TeV, using data collected at the Collider Detector at Fermilab during 1992-1995. The polarization of promptly produced J/ψ [ψ(2S)] mesons is isolated from those ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2000
Top quark production offers the unique opportunity to search for a charged Higgs boson (H±), as the contribution from t→H+b→τ+νb can be large in extensions of the standard model. We use results from a search for top quark pair production by the Collider De ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2000
We present a measurement of the cross section for production of two or more jets as a function of dijet mass, based on an integrated luminosity of 86 pb-1 collected with the Collider Detector at Fermilab. Our dijet mass spectrum is described within errors ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2000
This paper reports an updated measurement of the standard model CP violation parameter sin 2β using the CDF Detector at Fermilab. The entire run I data sample of 110 pb-1 of proton-antiproton collisions at √s =1.8 TeV is used to identify a signal sample of ...
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Journal ArticlePhysical Review D · 2000
This paper reports an updated measurement of the standard model CP violation parameter sin 2β using the CDF Detector at Fermilab. The entire run I data sample of 110 pb-1 of proton-antiproton collisions at √s = 1.8 TeV is used to identify a signal sample o ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 2000
This paper reports an updated measurement of the standard model (Formula presented) violation parameter (Formula presented) using the CDF Detector at Fermilab. The entire run I data sample of (Formula presented) of proton-antiproton collisions at (Formula ...
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Journal ArticlePhysical review letters · January 2000
We use the transverse momentum spectrum of leptons in the decay chain t-->bW with W-->lnu to measure the helicity of the W bosons in the top quark rest frame. Our measurement uses a t&tmacr; sample isolated in 106+/-4 pb(-1) of data collected in p&pmacr; c ...
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Journal ArticleNuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · October 1, 1999
The Intermediate Silicon Layers Detector is presently being built as part of the CDF upgrades to prepare for the next Tevatron data taking run, scheduled to start in the year 2000. The ISL will be located in the radial region between the Silicon Vertex Det ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1999
The kinematic properties of tt̄ events are studied in the W+ multijet channel using data collected with the CDF detector during the 1992-1995 runs at the Fermilab Tevatron collider corresponding to an integrated luminosity of 109 pb-1. Distributions of a va ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1999
We present a detailed description of a search for anomalous production of missing ET (Slashed E signT), jets, leptons (e, μ, τ), b quarks, or additional photons in events containing two isolated, central (|η|<1.0) photons with ET>12 GeV. The results ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1999
The lifetime of the BS0 meson is measured using the semileptonic decay BS0→DS-l+νX. The data sample consists of about 110 pb-1 of pp̄ collisions at √s=1.8 TeV collected by the CDF detector at Fermilab. Four different DS- decay modes are reconstructed result ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1999
The oscillation frequency Δmd of B0B̄0 mixing is measured using the partially reconstructed semileptonic decay B̄0→l-ν̄D*+X. The data sample was collected with the CDF detector at the Fermilab Tevatron collider during 1992-1995 by triggering on the existence ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1999
A new technique to measure the ratio of b quark fragmentation fractions in pp̄ collisions is described. Using a 70-pb-1 sample of low-mass dimuon trigger data recorded with the Collider Detector at Fermilab, we identify B mesons by observing the double semi ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1999
We present a measurement of the mass difference Δmd for the B0 meson and the statistical power of the b flavor tagging methods used. The measurement uses 90 pb-1 of data from pp̄ collisions at √s= 1.8 TeV collected with the CDF detector. An inclusive lepton ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1999
We present a measurement of the mass difference Δmd of the two Bd0 mass eigenstates. We use a flavor tagging method based on the lepton charge, in a sample of events with two muons at low transverse momentum. The sample corresponds to an integrated luminos ...
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Journal ArticlePhysical Review Letters · 1999
A search for Bs0-B̄s0 oscillations is performed in a sample of Bs0 semileptonic decays collected using dilepton triggers at the Tevatron Collider during 1992-1995. The Bs0 is reconstructed using φ mesonlepton correlations; its initial production flavor is d ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1999
We present a measurement of Z0 boson and Drell-Yan production cross sections in p̄p collisions at √s =1.8TeV using a sample of 107 pb-1 accumulated by the Collider Detector at Fermilab. The Drell-Yan cross section is measured in the mass range of Mμμ>40G ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1999
Bd0-B̄d0 oscillations are observed in "self-tagged" samples of partially reconstructed B mesons decaying into a lepton and a charmed meson collected in pp̄ collisions at √s=1.8 TeV. A flavor tagging technique is employed which relies upon the correlation bet ...
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Journal ArticleNuclear Physics B Proceedings Supplements · January 1, 1999
The Intermediate Silicon Layers (ISL) detector is presently being built as part of CDF upgrades. The ISL is a large radius (28 cm) silicon tracker with a total active area of about 3.5 m2. The challenge is to build a device which provides precis ...
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Journal ArticlePhysical Review Letters · January 1, 1999
We present a new measurement of the top quark mass in tt events in which both W bosons from top quarks decay into leptons (e ν, μ ν). We use events collected by the CDF experiment from pp collisions at √ s=1.8 TeV at the Tevatron collider. We measure a top ...
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Journal ArticlePhysical Review Letters · January 1, 1999
We have used 87pb−1 of data collected with the collider detector at Fermilab to search for new particles decaying to b¯b. We present model-independent upper limits on the cross section for narrow resonances which exclude the color-octet technirh ...
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Journal ArticlePhysical Review Letters · 1998
We report a measurement of the fraction of dijet events with a rapidity gap between jets produced by color-singlet exchange in p̄p collisions at √S = 630 GeV at the Fermilab Tevatron. In events with two jets of transverse energy ETjet > 8 GeV, pseudorapi ...
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Journal ArticlePhysical Review D · January 1, 1998
We search for new long-lived particles which decay to Z0 bosons by looking for Z0→e+e- decays with displaced vertices. We find no evidence for parent particles pf the Z0 with long lifetimes in 90 pb
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1998
We report the observation of bottom-charmed mesons Bc ni 1.8 TeV pp̄ collisions using the CDF detector at the Fermilab Tevatron. The Bc mesons were found through their semileptonic decays, B±c → J/ψl± X. A fit to the J/ψl mass distribution yielded 20.4+6.2- ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1998
We report the observations of the decays B+ → ψ(2S)K+ and B0 → ψ(2S)K*(892)0 in pp̄ collisions at a center-of-mass energy of 1.8 TeV using a 110 pb-1 data sample recorded by the Collider Detector at Fermilab. We also reconstruct the decays B+ → J/ψK+ and B0 ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1998
We present a search for the flavor-changing neutral current decays B0d→μ+μ- and B0s→μ+μ- in pp̄ collisions at √s=1.8 TeV, using 98 pb-1 of data collected at the Collider Detector at Fermilab. We find one candidate event for these decays, which is consistent ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1998
The lifetimes of the B- and B̄0 mesons are measured using the partially reconstructed semileptonic decays B̄ → Dl- v̄X, where D0 is either a D0 or D*+ meson. The data were collected by the CDF detector at the Fermilab Tevatron collider during 1992-1995 and co ...
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Journal ArticlePhysical Review Letters · January 1, 1998
We present an analysis of dilepton events originating from t¯t production in p¯p collisions at √s = 1.8TeV at the Fermilab Tevatron Collider. The sample corresponds to an integrated luminosity of 109 ± 7pb-1. We observe nine candidate events, wi ...
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Journal ArticlePhysical Review Letters · 1998
We present a measurement of the time-dependent asymmetry in the rate for B̄d0 versus Bd0 decays to J/ψ KS0. A nonzero asymmetry would be an indication of CP violation, and within the standard model this may be used to measure the CP-violation parameter sin( ...
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Journal ArticlePhysical Review Letters · 1998
We have searched for the decays Bs0 → e±μ∓ and Bd0 → e±μ∓ using a 102 pb-1 data sample of pp̄ collisions at √s = 1.8 TeV collected with the Collider Detector at Fermilab. We set upper limits on the branching fractions of B(Bs0 → e±μ∓) < 6.1(8.2) × 10-6 a ...
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Journal ArticlePhysical Review Letters · January 1, 1998
We present a measurement of the t¯t production cross section in p¯p collisions at √s = 1.8TeV using an integrated luminosity of 109pb-1 collected with the Collider Detector at Fermilab. The measurement uses t¯t decays into final states which con ...
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Journal ArticlePhysical Review Letters · 1998
We present a measurement of the B0 ↔ B̄0 oscillalion frequency using a flavor tagging method based on correlations of B meson flavor with the charge of other particles produced in pp̄ collisions at √s = 1.8 TeV. Such correlations are expected to arise from b ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · March 1, 1997
We present measurements of correlated bb̄ cross sections, μ-μ, correlations, the average B0B̄0 mixing parameter χ̄, and a limit on the CP-violating parameter ∈B. For these measurements, we use muon pairs from bb double semilep ...
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Journal ArticlePhysical Review Letters · January 1, 1997
We present a search for dilepton events from tt¯ production with one electron or muon and one hadronically decaying τ lepton from the decay tt¯→(ℓνℓ)(τντ)bbú, (ℓ=e,μ), using the Collider Detector at Fermilab. In a 109pb−1 d ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 1997
The decay Λ0b→J/ψ Λ is observed in 110 pb-1 of pp̄ collisions taken at √s=1.8 TeV. These data are used to measure a Λ0b mass of 5621±4(stat)±3(syst) MeV/c2, and a mass difference between the Λ0b and the B0 of 340±5(stat)±1(syst) MeV/c2. The production cross ...
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Journal ArticlePhysical Review Letters · January 1, 1997
A strong signal for double parton scattering (DP) is observed in a 16 pb−1 sample of pp → γ + 3 jets + X data from the CDF experiment at the Fermilab Tevatron. The process-independent DP parameter, σ eff, is obtained without reference ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 1997
We present measurements of correlated [Formula presented] cross sections, [Formula presented] correlations, the average [Formula presented] mixing parameter [Formula presented], and a limit on the CP-violating parameter [Formula presented] For these measur ...
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Journal ArticlePhysical Review Letters · January 1, 1997
We present a study of J/ψ and ψ(2S) production in pp collisons at √ s = 1.8 TeV with the CDF detector at Fermilab. The J/ψ and ψ(2S) mesons are reconstructed using their μ+μ− decay modes. We have measured the inclusive production cros ...
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Journal ArticlePhysical Review D Particles Fields Gravitation and Cosmology · January 1, 1997
The decay [Formula presented]→J/ψ Λ is observed in 110 [Formula presented] of pp¯ collisions taken at [Formula presented] TeV. These data are used to measure a Λ[Formula presented] mass of 5621±4(stat)±3(syst) MeV/[Formula presented], and a mass difference ...
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Journal ArticlePhysical Review Letters · 1996
We have searched for the rare decay W± → π± + γ in 16.7 pb-1 of data taken in proton-antiproton collisions at ∫s = 1.8 TeV with the CDF detector at Fermilab. We find one event consistent with the expected signal, and estimate the background to be 2.6 ± 1.0 ...
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Journal ArticlePhysical Review Letters · 1996
We report on the reconstruction of the decay mode B0 → J/ψKS0 using 19.3 pb-1 of data collected by the Collider Detector at Fermilab in p̄p collisions at s√ = 1.8 TeV. A signal of 41.8 ± 6.9 events, with a signal-to-background ratio of 9:1, is observed. Thr ...
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Journal ArticlePhysical Review Letters · 1996
The lifetime of the Bs0 meson is measured using the exclusive decay mode Bs0 → J / ψ φ, where J/ψ → μ+μ- and φ → K+K-. The data sample consists of 110 pb-1 of p p̄ collisions at √s = 1.8 TeV, collected by the CDF detector at the Fermilab Tevatron collider d ...
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Journal ArticlePhysical Review Letters · 1996
The lifetime of Λb0^ is measured using the semileptonic decay Λb0 → Λc+l-ν-, where the Λc+ is reconstructed through its decay Λc+ → pK- π+. The data were collected by the CDF detector at the Tevatron Collider during 1992-1995 and correspond to an integrate ...
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Journal ArticlePhysical Review Letters · 1996
We report on a measurement of the branching fraction of the Cabibbo-suppressed decay Bu+→J/ψπ+ , where J/ψ→μ+μ-. The data were collected by the Collider Detector at Fermilab during 1992-1995 and correspond to an integrated luminosity of 110 pb-1 in p̄p coll ...
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Journal ArticlePhysical Review Letters · 1996
We present a measurement of σB(W → ev) and σB(Z0 → e+e-) in proton-antiproton collisions at √s = 1.8 TeV using a significantly improved understanding of the integrated luminosity. The data represent an integrated luminosity of 19.7 pb-1 from the 1992-1993 ...
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Journal ArticleNuclear Inst and Methods in Physics Research A · June 1, 1995
The Collider Detector at Fermilab (CDF) radiation hardened silicon vertex detector (SVX') is described. The new detector has several improvements over its predecessor such as better signal to noise and higher efficiency. It is expected to have a radiation ...
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Journal ArticlePhysical Review Letters · 1995
We report on measurements of the (1S), (2S), and (3S) differential, (d2 dPtdy)y=0, and integrated cross sections in pp» collisions at s=1.8 TeV using a sample of 16.6 0.6 pb-1 collected by the Collider Detector at Fermilab. The three resonances were recons ...
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Journal ArticlePhysical Review Letters · 1994
We present a measurement of the ratio σB(W→eν)σB(Z0→e+e-) in p̄p collisions at s=1.8 TeV The data represent an integrated luminosity of 21.7 pb-1 from the 1992-1993 run of the Collider Detector at Fermilab. We find σB(W→eν)σB(Z0→e+e-)=10.90±0.32(stat)±0. 29 ...
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Journal ArticlePhysical Review Letters · 1994
The W+jet angular distribution is measured using W→eν events recorded with the Collider Detector at Fermilab (CDF) during the 1988-89 and 1992-93 Tevatron runs. The data agree well with both a leading order and a next-to-leading order theoretical predictio ...
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Journal ArticleNuclear Physics Section A · February 27, 1989
The lifetime of the yrast 15 2- state in 215Ra was measured using pulsed beams and γ-ray and electron techniques. Transition multipolarities were established from measured conversion coefficients. The B(E3) of the 15 2-→ 9 ...
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