Journal ArticlePhysical review letters · August 2022
This Letter reports the observation of WWW production and a measurement of its cross section using 139 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. Events with tw ...
Full textCite
Journal ArticleScience (New York, N.Y.) · April 2022
The mass of the W boson, a mediator of the weak force between elementary particles, is tightly constrained by the symmetries of the standard model of particle physics. The Higgs boson was the last missing component of the model. After observation of ...
Full textCite
Journal ArticlePhysical review letters · December 2021
A search for lepton-flavor-violating Z→eτ and Z→μτ decays with pp collision data recorded by the ATLAS detector at the LHC is presented. This analysis uses 139 fb^{-1} of Run 2 pp collisions at sqrt[s]=13 TeV and is combined with the results of a similar ...
Full textCite
Journal ArticlePhysical review letters · October 2021
A search for new phenomena is presented in final states with two leptons and one or no b-tagged jets. The event selection requires the two leptons to have opposite charge, the same flavor (electrons or muons), and a large invariant mass. The analysis is ba ...
Full textCite
Journal ArticlePhysical review letters · November 2020
A search for Higgs boson decays into a Z boson and a light resonance in two-lepton plus jet events is performed, using a pp collision dataset with an integrated luminosity of 139 fb^{-1} collected at sqrt[s]=13 TeV by the ATLAS experiment at the CERN LHC ...
Full textCite
Journal ArticlePhysical review letters · September 2020
This Letter describes a search for narrowly resonant new physics using a machine-learning anomaly detection procedure that does not rely on signal simulations for developing the analysis selection. Weakly supervised learning is used to train classifiers di ...
Full textCite
Journal ArticlePhysical review letters · August 2020
A study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and top quarks is presented. Higgs bosons are identified via the diphoton decay channel (H→γγ), and their production in association with a top quark pai ...
Full textCite
Journal ArticlePhysical review letters · July 2020
A search for heavy neutral Higgs bosons is performed using the LHC Run 2 data, corresponding to an integrated luminosity of 139 fb^{-1} of proton-proton collisions at sqrt[s]=13 TeV recorded with the ATLAS detector. The search for heavy resonances is per ...
Full textCite
Journal ArticlePhysical review letters · June 2020
The prevalence of hadronic jets at the LHC requires that a deep understanding of jet formation and structure is achieved in order to reach the highest levels of experimental and theoretical precision. There have been many measurements of jet substructure a ...
Full textCite
Journal ArticlePhysical review letters · February 2020
The elliptic flow of muons from the decay of charm and bottom hadrons is measured in pp collisions at sqrt[s]=13 TeV using a data sample with an integrated luminosity of 150 pb^{-1} recorded by the ATLAS detector at the LHC. The muons from heavy-flavor d ...
Full textCite
Journal ArticlePhysical review letters · January 2020
A search for magnetic monopoles and high-electric-charge objects is presented using 34.4 fb^{-1} of 13 TeV pp collision data collected by the ATLAS detector at the LHC during 2015 and 2016. The considered signature is based upon high ionization in the tra ...
Full textCite
Journal ArticlePhysical review letters · October 2019
This Letter presents the observation and measurement of electroweak production of a same-sign W boson pair in association with two jets using 36.1 fb^{-1} of proton-proton collision data recorded at a center-of-mass energy of sqrt[s]=13 TeV by the ATLAS ...
Full textCite
Journal ArticlePhysical review letters · August 2019
This Letter describes the observation of the light-by-light scattering process, γγ→γγ, in Pb+Pb collisions at sqrt[s_{NN}]=5.02 TeV. The analysis is conducted using a data sample corresponding to an integrated luminosity of 1.73 nb^{-1}, collected in Nov ...
Full textCite
Journal ArticlePhysical review letters · July 2019
Charged-particle fragmentation functions for jets azimuthally balanced by a high-transverse-momentum, prompt, isolated photon are measured in 25 pb^{-1} of pp and 0.49 nb^{-1} of Pb+Pb collision data at 5.02 TeV per nucleon pair recorded with the ATLAS d ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2019
A search for doubly charged scalar bosons decaying into W boson pairs is presented. It uses a data sample from proton-proton collisions corresponding to an integrated luminosity of 36.1 fb -1 collected by the ATLAS detector at the LHC at a centre-of ...
Full textCite
Journal ArticlePhysical review letters · November 2018
A search for resonant and nonresonant pair production of Higgs bosons in the bb[over ¯]τ^{+}τ^{-} final state is presented. The search uses 36.1 fb^{-1} of pp collision data with sqrt[s]=13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016 ...
Full textCite
Journal ArticlePhysical review letters · October 2018
This Letter presents a normalized differential cross-section measurement in a fiducial phase-space region where interference effects between top-quark pair production and associated production of a single top quark with a W boson and a b-quark are signific ...
Full textCite
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 2015 and 20 ...
Full textCite
Journal ArticlePhysical review letters · August 2018
Searches for dijet resonances with sub-TeV masses using the ATLAS detector at the Large Hadron Collider can be statistically limited by the bandwidth available to inclusive single-jet triggers, whose data-collection rates at low transverse momentum are muc ...
Full textCite
Journal ArticlePhysical review letters · August 2018
Jet substructure observables have significantly extended the search program for physics beyond the standard model at the Large Hadron Collider. The state-of-the-art tools have been motivated by theoretical calculations, but there has never been a direct co ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical review letters · May 2018
A search for the narrow structure, X(5568), reported by the D0 Collaboration in the decay sequence X→B_{s}^{0}π^{±}, B_{s}^{0}→J/ψϕ, is presented. The analysis is based on a data sample recorded with the ATLAS detector at the LHC corresponding to 4.9 fb^{ ...
Full textCite
Journal ArticlePhysical review letters · May 2018
A direct search for the standard model Higgs boson decaying to a pair of charm quarks is presented. Associated production of the Higgs and Z bosons, in the decay mode ZH→ℓ^{+}ℓ^{-}cc[over ¯] is studied. A data set with an integrated luminosity of 36.1 fb^ ...
Full textCite
Journal ArticlePhysical review letters · May 2018
A search for the exotic meson X(5568) decaying into the B_{s}^{0}π^{±} final state is performed using data corresponding to 9.6 fb^{-1} from pp[over ¯] collisions at sqrt[s]=1960 GeV recorded by the Collider Detector at Fermilab. No evidence for this sta ...
Full textCite
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. ...
Full textCite
Journal ArticlePhysical review letters · April 2018
A search for high-mass resonances decaying to τν using proton-proton collisions at sqrt[s]=13 TeV produced by the Large Hadron Collider is presented. Only τ-lepton decays with hadrons in the final state are considered. The data were recorded with the ATLA ...
Full textCite
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=13 TeV. The data used correspond to a total integrated luminosity ...
Full textCite
Journal ArticlePhysical review letters · January 2018
The CDF and D0 experiments at the Fermilab Tevatron have measured the asymmetry between yields of forward- and backward-produced top and antitop quarks based on their rapidity difference and the asymmetry between their decay leptons. These measurements use ...
Full textCite
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 ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2018
A search for new phenomena in final states containing an e+e- or μ+μ- pair, jets, and large missing transverse momentum is presented. This analysis makes use of proton-proton collision data with an integrated luminosity of 36.1fb-1 , collected during 2015 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical review letters · November 2017
A search for heavy pseudoscalar (A) and scalar (H) Higgs bosons decaying into a top quark pair (tt[over ¯]) has been performed with 20.3 fb^{-1} of proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a center-of- ...
Full textCite
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. ...
Full textCite
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-mass energy ...
Full textCite
Journal ArticlePhysical review letters · August 2017
A search for the dimuon decay of the Higgs boson was performed using data corresponding to an integrated luminosity of 36.1 fb^{-1} collected with the ATLAS detector in pp collisions at sqrt[s]=13 TeV at the Large Hadron Collider. No significant excess i ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
A measurement of the calorimeter response to isolated charged hadrons in the ATLAS detector at the LHC is presented. This measurement is performed with 3.2 nb[Formula: see text] of proton-proton collision data at [Formula: see text] [Formula: see text] fro ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
The production of two prompt [Formula: see text] mesons, each with transverse momenta [Formula: see text] GeV and rapidity [Formula: see text], is studied using a sample of proton-proton collisions at [Formula: see text] TeV, corresponding to an integrated ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
A measurement of the [Formula: see text] and [Formula: see text] production cross sections in final states with either two same-charge muons, or three or four leptons (electrons or muons) is presented. The analysis uses a data sample of proton-proton colli ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
Two searches for new phenomena in final states containing a same-flavour opposite-sign lepton (electron or muon) pair, jets, and large missing transverse momentum are presented. These searches make use of proton-proton collision data, collected during 2015 ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
This paper reports a search for triboson [Formula: see text] production in two decay channels ([Formula: see text] and [Formula: see text] with [Formula: see text]) in proton-proton collision data corresponding to an integrated luminosity of 20.3 [Formula: ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
This paper describes the algorithms for the reconstruction and identification of electrons in the central region of the ATLAS detector at the Large Hadron Collider (LHC). These algorithms were used for all ATLAS results with electrons in the final state th ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
The reconstruction and calibration algorithms used to calculate missing transverse momentum ([Formula: see text] ) with the ATLAS detector exploit energy deposits in the calorimeter and tracks reconstructed in the inner detector as well as the muon spectro ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
Measurements of jet activity in top-quark pair events produced in proton-proton collisions are presented, using 3.2 fb[Formula: see text] of pp collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
This paper presents a measurement of the polarisation of W bosons from [Formula: see text] decays, reconstructed in events with one high-[Formula: see text] lepton and at least four jets. Data from pp collisions at the LHC were collected at [ ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
This article presents measurements of [Formula: see text] differential cross-sections in a fiducial phase-space region, using an integrated luminosity of 3.2 fb[Formula: see text] of proton-proton data at a centre-of-mass energy of [Formula: see text] TeV ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
Detailed measurements of t-channel single top-quark production are presented. They use 20.2 fb[Formula: see text] of data collected by the ATLAS experiment in proton-proton collisions at a centre-of-mass energy of 8 TeV at the LHC. Total, fiducial a ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2017
With the increase in energy of the Large Hadron Collider to a centre-of-mass energy of 13 [Formula: see text] for Run 2, events with dense environments, such as in the cores of high-energy jets, became a focus for new physics searches as well as measuremen ...
Full textCite
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 compatible with a W ...
Full textCite
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=5.02TeV. Char ...
Full textCite
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. The cross s ...
Full textCite
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 ...
Full textCite
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 candidates are reconstructed using ...
Full textCite
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 transverse mass distributi ...
Full textCite
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 as a resona ...
Full textCite
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 the ATLAS ...
Full textCite
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 ...
Full textCite
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 ...
Full textLink to itemCite
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 detector at the LHC. This mea ...
Full textCite
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 ...
Full textCite
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 dilepton i ...
Full textCite
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 ...
Full textCite
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–proton collision ...
Full textCite
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 observables rel ...
Full textCite
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 ...
Full textCite
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 TeV recorded ...
Full textCite
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 reconstructed u ...
Full textCite
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 ...
Full textCite
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 decay channel ...
Full textCite
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 ννqq, ℓνqq ...
Full textCite
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 s=8 TeV. A ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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−1. The fin ...
Full textCite
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 recorded by the A ...
Full textCite
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 at the Large Hadron Collider, corresponding to a total integrated luminosity ...
Full textCite
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 ...
Full textCite
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 performed for invariant masses of the lepton pairs, mℓℓ, betw ...
Full textCite
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 and 1.56 ≤ |η ...
Full textCite
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-of-mass energy of s=8 T ...
Full textCite
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 ...
Full textCite
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 measured parameters include the CP -violating phase ϕs, the d ...
Full textCite
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 describing thes ...
Full textCite
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 during a spe ...
Full textCite
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 collisions at a centre-of ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 charmed mesons have been reconstructed in the range of ...
Full textCite
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 squark is ass ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 corresponding to an integrated luminosity o ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 pp collisio ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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. The production of a ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical Review D · February 26, 2016
An updated measurement of the single top quark production cross section is presented using the full data set collected by the Collider Detector at Fermilab (CDF), corresponding to 9.5 fb-1 of integrated luminosity from proton-antiproton collisions at 1.96 ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2016
Fiducial cross-sections for [Formula: see text] production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb[Formula: see text] of proton-proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadr ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2016
Combined analyses of the Higgs boson production and decay rates as well as its coupling strengths to vector bosons and fermions are presented. The combinations include the results of the analyses of the [Formula: see text] and [Formula: see text] decay mod ...
Full textCite
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 ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2016
The decays [Formula: see text] and [Formula: see text] are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb[Formula: see text] of pp collisions collected at centre-of-mass energie ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A search for the flavour-changing neutral-current decay [Formula: see text] is presented. Data collected by the ATLAS detector during 2012 from proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of [Formula: see text] TeV, cor ...
Full textCite
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 2012 at the ...
Full textCite
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 ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A search for single top-quark production via flavour-changing neutral current processes from gluon plus up- or charm-quark initial states in proton-proton collisions at the LHC is presented. Data collected with the ATLAS detector in 2012 at a centre-of-mas ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2016
A search for direct pair production of the supersymmetric partner of the top quark, decaying via a scalar tau to a nearly massless gravitino, has been performed using 20 fb[Formula: see text] of proton-proton collision data at [Formula: see text]. The data ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2016
The number of charged particles inside jets is a widely used discriminant for identifying the quark or gluon nature of the initiating parton and is sensitive to both the perturbative and non-perturbative components of fragmentation. This paper presents a m ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textLink to itemCite
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 ...
Full textCite
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 ...
Full textLink to itemCite
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 function of the Mandelstam ...
Full textCite
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. ...
Full textCite
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 ...
Full textLink to itemCite
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 ...
Full textLink to itemCite
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 ...
Full textLink to itemCite
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 ...
Full textLink to itemCite
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. ...
Full textCite
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 TeV at the LHC using an integrated luminosity of 20.6 fb−1. The J/ψ ...
Full textCite
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 Hadron Collide ...
Full textCite
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 ...
Full textCite
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 jets with ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · November 23, 2015
We study charged particle production (pT>0.5 GeV/c, |η|<0.8) in proton-antiproton collisions at total center-of-mass energies s=300 GeV, 900 GeV, and 1.96 TeV. We use the direction of the charged particle with the largest transverse momentum in each event ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 mesons are ...
Full textCite
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 ...
Full textCite
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. For the electron or muon pa ...
Full textCite
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. Five final st ...
Full textCite
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} ...
Full textCite
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 ...
Full textCite
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 at centre- ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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, respectively, i ...
Full textCite
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 results are based on the full set of ...
Full textCite
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 ...
Full textCite
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 datasets corre ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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-mass energy ...
Full textCite
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 √s=7$$ \sqrt ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 the LHC. N ...
Full textCite
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 ...
Full textCite
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 fusion (VBF) pro ...
Full textCite
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 and correspond to an in ...
Full textCite
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 detector at the CERN Large Hadron Colli ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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+W- cross s ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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. ...
Full textCite
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 charged leptons, ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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. ...
Full textCite
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−1. This analy ...
Full textCite
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. ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 20.3 fb−1 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 collected by the ATLAS experiment at th ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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- ...
Full textCite
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 ...
Full textCite
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 Collider in 2 ...
Full textCite
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 ...
Full textCite
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 corresponding to integrated luminosities of ...
Full textCite
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 $$ TeV collected by the ATLAS detector at the Large Hadron Collider. No ex ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 8, 2015
Abstract: The tt¯$$ 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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 s=8 TeV pp collision data collected by the ATLAS detector at the ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 collisions at ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 8 TeV with ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2015
This paper reports on a search for narrow resonances in diboson production in the [Formula: see text] final state using [Formula: see text] collision data corresponding to an integrated luminosity of [Formula: see text] fb[Formula: see text] collected at [ ...
Full textCite
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 WW + WZ cros ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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. ...
Full textCite
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- ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 = 8 TeV recor ...
Full textCite
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 at the LHC, corresponding to an i ...
Full textCite
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, and explores ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2015
Studies of the spin, parity and tensor couplings of the Higgs boson in the [Formula: see text], [Formula: see text] and [Formula: see text] decay processes at the LHC are presented. The investigations are based on [Formula: see text] of pp collision ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2015
The paper presents studies of Bose-Einstein Correlations (BEC) for pairs of like-sign charged particles measured in the kinematic range [Formula: see text] 100 MeV and [Formula: see text] 2.5 in proton collisions at centre-of-mass energies of 0.9 and 7 TeV ...
Full textCite
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 ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2015
This paper reviews and extends searches for the direct pair production of the scalar supersymmetric partners of the top and bottom quarks in proton-proton collisions collected by the ATLAS collaboration during the LHC Run 1. Most of the analyses use 20 [Fo ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 detector at the Large ...
Full textCite
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 sN ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical review letters · December 2014
We report final measurements of direct CP-violating asymmetries in charmless decays of neutral bottom hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using the complete √s=1.96 TeV proton-antiproton collis ...
Full textCite
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 ...
Full textCite
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 as a function of the M ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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−1 of proton–proton coll ...
Full textCite
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 ...
Full textCite
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 dimuon invariant mass distribution is ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 at the Z-bos ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 the ATLAS detector at the LHC. Si ...
Full textCite
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 and upper ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 detector at th ...
Full textCite
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 Large Hadron Co ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 recorded by ...
Full textCite
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 experiment ...
Full textCite
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 ...
Full textCite
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 top squark is ...
Full textCite
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 Collider. No sign ...
Full textCite
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 ...
Full textCite
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+e− and Z/γ* → μ+μ− cha ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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- ...
Full textCite
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 ...
Full textCite
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
Full textCite
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 ...
Full textCite
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) of 7 (8) TeV pp ...
Full textCite
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 collision data a ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 Large Hadron Collider. The observed ...
Full textCite
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 or muon, the ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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. ...
Full textCite
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 ( ...
Full textCite
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 ...
Full textCite
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 events involving the production of ...
Full textCite
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 a single c ...
Full textCite
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 ...
Full textCite
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 mass distr ...
Full textCite
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 events with a si ...
Full textCite
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 ...
Full textCite
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 Hadron Coll ...
Full textCite
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: ...
Full textCite
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 ...
Full textCite
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 Collider in 2012 ...
Full textCite
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 ...
Full textCite
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 at √ = 7TeV ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 at a centr ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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, ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 Collider. The ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 GeV/c in jets with transverse energy betwee ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 momentum pT > 0.5GeV a ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 parametrization of the as ...
Full textCite
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 its observable effective-leptonic sin2θw, or s ...
Full textCite
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 experiment at ...
Full textCite
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- and Λc+→pK-π+ decays. The anal ...
Full textCite
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 the Z/γ⁎→e+ ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 searches cons ...
Full textCite
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-, H→ZZ, H→τ+τ-, ...
Full textCite
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 recorded by the ATLAS ...
Full textCite
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 collisions ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · August 30, 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 alternative hypotheses usi ...
Full textCite
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 luminosity from ...
Full textCite
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 method using the ATLAS d ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · August 6, 2013
The measurement of charged-particle event shape variables is presented in inclusive inelastic pp collisions at a center-of-mass energy of 7 TeV using the ATLAS detector at the LHC. The observables studied are the transverse thrust, thrust minor, and transv ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 semilepton ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · June 10, 2013
This Letter presents the results of a search for a heavy particle decaying into an e±μ∓, e±τ∓, or μ±τ∓ final state in pp collisions at s=7 TeV. The data were recorded with the ATLAS detector at the LHC during 2011 and correspond to an integrated luminosity ...
Full textCite
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-1 col ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · June 3, 2013
This paper presents a measurement of the W+W- production cross section in pp collisions at √s=7 TeV. The leptonic decay channels are analyzed using data corresponding to an integrated luminosity of 4.6 fb-1 collected with the ATLAS detector at the Large Ha ...
Full textCite
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 ...
Full textCite
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- ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · May 24, 2013
A search for highly ionising, penetrating particles with electric charges from |q|=2e to 6e is performed using the ATLAS detector at the CERN Large Hadron Collider. Proton-proton collision data taken at s=7 TeV during the 2011 running period, corresponding ...
Full textCite
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 Tevatron. As ...
Full textCite
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 detector during p ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · April 25, 2013
The results of a search for an excited bottom-quark b⁎ in pp collisions at s=7 TeV, using 4.7 fb−1 of data collected by the ATLAS detector at the LHC are presented. In the model studied, a single b⁎-quark is produced through a chromomagnetic interaction an ...
Full textCite
Journal ArticleJournal of High Energy Physics · April 24, 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 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · April 10, 2013
A search is performed for collimated muon pairs displaced from the primary vertex produced in the decay of long-lived neutral particles in proton–proton collisions at s=7 TeV centre-of-mass energy, with the ATLAS detector at the LHC. In a 1.9 fb−1event sam ...
Full textCite
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 Fermilab Tevatron collider. The observed number of B0 cand ...
Full textCite
Journal ArticleNew Journal of Physics · April 1, 2013
The large difference between the Planck scale and the electroweak scale, known as the hierarchy problem, is addressed in certain models through the postulate of extra spatial dimensions. A search for evidence of extra spatial dimensions in the diphoton cha ...
Full textCite
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 ATLAS dete ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · March 26, 2013
A search for long-lived particles is performed using a data sample of 4.7 fb−1 from proton–proton collisions at a centre-of-mass energy s=7 TeV collected by the ATLAS detector at the LHC. No excess is observed above the estimated background and lower limit ...
Full textCite
Journal ArticleNew Journal of Physics · March 25, 2013
The production of W bosons in association with two jets in proton-proton collisions at a centre-of-mass energy of √ s = 7 TeV has been analysed for the presence of double-parton interactions using data corresponding to an integrated luminosity of 36 pb-1, ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · March 13, 2013
The results of a search for pair production of light top squarks are presented, using 4.7 fb−1 of s=7 TeV proton–proton collisions collected with the ATLAS detector at the Large Hadron Collider. This search targets top squarks with masses similar to, or li ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · March 13, 2013
A measurement of angular correlations in Drell–Yan lepton pairs via the ϕη⁎ observable is presented. This variable probes the same physics as the Z/γ⁎ boson transverse momentum with a better experimental resolution. The Z/γ⁎→e+e− and Z/γ⁎→μ+μ− decays produ ...
Full textCite
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 proton-ant ...
Full textCite
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 dimuon dec ...
Full textCite
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 in 2011 by ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 collecte ...
Full textCite
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 ...
Full textCite
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 integrated luminosity of 8.7 fb-1. ...
Full textCite
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 is predicted ...
Full textCite
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 ...
Full textCite
Journal ArticleEuropean Physical Journal C · February 12, 2013
This paper describes a measurement of the flavour composition of dijet events produced in pp collisions at √s = 7 TeV using the ATLAS detector. The measurement uses the full 2010 data sample, corresponding to an integrated luminosity of 39 pb−1. ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · February 4, 2013
A measurement of the Λb0 lifetime and mass in the decay channel Λb0→J/ψ(μ+μ-)Λ0(pπ -) is presented. The analysis uses a signal sample of about 2200 Λb0 and Λ̄b0 decays that are reconstructed in 4.9 fb -1 of ATLAS pp collision data collected in 2011 at the L ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 22, 2013
A search for squarks and gluinos in final states containing jets, missing transverse momentum and no high-pT electrons or muons is presented. The data represent the complete sample recorded in 2011 by the ATLAS experiment in 7 TeV proton-proton collisions ...
Full textCite
Journal ArticleEuropean Physical Journal C · January 15, 2013
Measurements are presented of differential crosss√ ections for top quark pair production in pp collisions at s = 7 TeV relative to the total inclusive top quark pair production cross-section. A data sample of 2.05 fb−1 recorded by the ATLAS detector at the ...
Full textCite
Journal ArticleEuropean Physical Journal C · January 15, 2013
A search for pair-produced massive coloured scalar particles decaying to a four-jet final state is performed by the ATLAS experiment at the LHC in proton–proton collisions at √s = 7 TeV. The analysed data sample corresponds to an integrated luminosity of 4 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · January 8, 2013
A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of s=7 TeV proton–proton collision data delivered by the Large Had ...
Full textCite
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 ...
Full textCite
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 CDF II detector at the Fermilab Tevatron. Th ...
Full textCite
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 ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 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 determined to ...
Full textCite
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 (AMSB) models, ...
Full textCite
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 and 8 TeV, ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 and result ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical review letters · January 2013
Results of a search for new phenomena in events with an energetic photon and large missing transverse momentum in proton-proton collisions at sqrt[s] = 7 TeV are reported. Data collected by the ATLAS experiment at the LHC corresponding to an integrated lum ...
Full textCite
Journal ArticlePhysical review letters · January 2013
The ATLAS experiment has observed 1995 Z boson candidates in data corresponding to 0.15 nb(-1) of integrated luminosity obtained in the 2011 LHC Pb+Pb run at sqrt[s(NN)]=2.76 TeV. The Z bosons are reconstructed via dielectron and dimuon decay channels, w ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 1, 2013
Mass and angular distributions of dijets produced in LHC proton-proton collisions at a centre-of-mass energy √s = 7TeV have been studied with the ATLAS detector using the full 2011 data set with an integrated luminosity of 4.8 fb-1. Dijet masses up to ~ 4. ...
Full textCite
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 ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 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 ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 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 generations equally, while H + ...
Full textCite
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 ...
Full textCite
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- ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2013
The measurement of the jet energy resolution is presented using data recorded with the ATLAS detector in proton-proton collisions at [Formula: see text]. The sample corresponds to an integrated luminosity of 35 pb-1. Jets are reconstructed from ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 2013
A search for resonant diboson production using a data sample corresponding to 4:7 fb–1of integrated luminosity collected by the ATLAS experiment at the Large Hadron Collider in pp collisions at √s = 7 TeV is presented. The search for a narrow resonance in ...
Full textCite
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 the tt̄→ WbW ...
Full textCite
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 ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 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 leptoquark is ass ...
Full textCite
Journal ArticleJournal of Instrumentation · January 1, 2013
This paper presents a summary of beam-induced backgrounds observed in the ATLAS detector and discusses methods to tag and remove background contaminated events in data. Triggerrate based monitoring of beam-related backgrounds is presented. The correlations ...
Full textCite
Journal ArticleJournal of Instrumentation · January 1, 2013
A set of three dedicated triggers designed to detect long-lived neutral particles decaying throughout the ATLAS detector to a pair of hadronic jets is described. The efficiencies of the triggers for selecting displaced decays as a function of the decay pos ...
Full textCite
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 Collider. I ...
Full textCite
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 ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2013
The luminosity calibration for the ATLAS detector at the LHC during pp collisions at [Formula: see text] in 2010 and 2011 is presented. Evaluation of the luminosity scale is performed using several luminosity-sensitive detectors, and comparisons are ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · December 5, 2012
A search for diphoton events with large missing transverse momentum has been performed using proton-proton collision data at s=7 TeV recorded with the ATLAS detector, corresponding to an integrated luminosity of 4.8 fb-1. No excess of events was observed a ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · December 5, 2012
A search for the Standard Model Higgs boson has been performed in the H→WW→ℓνjj channel using 4.7 fb−1 of pp collision data recorded at a centre-of-mass energy of s=7 TeV with the ATLAS detector at the Large Hadron Collider. Higgs boson candidates produced ...
Full textCite
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 ATLAS detect ...
Full textCite
Journal ArticlePhysical review letters · December 2012
This Letter presents a search for magnetic monopoles with the ATLAS detector at the CERN Large Hadron Collider using an integrated luminosity of 2.0 fb(-1) of pp collisions recorded at a center-of-mass energy of sqrt[s]=7 TeV. No event is found in the si ...
Full textCite
Journal ArticleScience (New York, N.Y.) · December 2012
Nearly 50 years ago, theoretical physicists proposed that a field permeates the universe and gives energy to the vacuum. This field was required to explain why some, but not all, fundamental particles have mass. Numerous precision measurements during recen ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · November 26, 2012
This paper presents a search for a new heavy particle produced in association with a top or antitop quark. Two models in which the new heavy particle is a color singlet or a color triplet are considered, decaying, respectively, to t̄q or tq, leading to a re ...
Full textCite
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 collision data at √ ...
Full textCite
Journal ArticleEuropean Physical Journal C · November 20, 2012
A measurement of event shape variables is presented for large momentum transfer proton-proton collisions using the ATLAS detector at the Large Hadron Collider. Six event shape variables calculated using hadronic jets are studied in inclusive multi-jet even ...
Full textCite
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 CDF and 5.2 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · November 2, 2012
This work presents a new inclusive search for supersymmetry (SUSY) by the ATLAS experiment at the LHC in proton-proton collisions at a center-of-mass energy √s=7TeV in final states with jets, missing transverse momentum and one or more isolated electrons a ...
Full textCite
Journal ArticlePhysical review letters · November 2012
A search for direct pair production of supersymmetric top squarks (t(1)) is presented, assuming the t(1) decays into a top quark and the lightest supersymmetric particle, χ(1)(0), and that both top quarks decay to purely hadronic final states. A total of 1 ...
Full textCite
Journal ArticlePhysical review letters · November 2012
A search is presented for direct top squark pair production in final states with one isolated electron or muon, jets, and missing transverse momentum in proton-proton collisions at sqrt[s] = 7 TeV. The measurement is based on 4.7 fb(-1) of data collected w ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · October 31, 2012
We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb−1 of pp collision data at s=7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momen ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · October 22, 2012
A search for a Standard Model Higgs boson decaying via H→ZZ→ℓ+ℓ−νν¯ where ℓ represents electrons or muons, is presented. It is based on proton-proton collision data at s=7 TeV, collected by the ATLAS experiment at the LHC during 2011 and corresponding to a ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · October 22, 2012
This Letter presents measurements of l±νγ and l+l−γ (l=e,μ) production in 1.02 fb−1 of pp collision data recorded at s=7 TeV with the ATLAS detector at the LHC in the first half of 2011. Events dominated by Wγ and Zγ production with leptonic decays of the ...
Full textCite
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 the sensitivi ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · October 15, 2012
Measurements are presented of the properties of high transverse momentum jets, produced in proton-proton collisions at a center-of-mass energy of √s=7TeV. The data correspond to an integrated luminosity of 35pb -1 and were collected with the ATLAS detector ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · October 9, 2012
Distributions sensitive to the underlying event are studied in events containing one or more charged-particle jets produced in pp collisions at √s=7TeV with the ATLAS detector at the Large Hadron Collider (LHC). These measurements reflect 800μb-1 of data t ...
Full textCite
Journal ArticleEuropean Physical Journal C · October 6, 2012
A study of W ± Z production in proton-proton collisions at √s = 7 TeV is presented using data corresponding to an integrated luminosity of 4.6 fb−1 collected with the ATLAS detector at the Large Hadron Collider in 2011. In total, 317 candidates, with a bac ...
Full textCite
Journal ArticleEuropean Physical Journal C · October 6, 2012
This letter reports the results of a search for top and bottom squarks from gluino pair production in 4.7 fb−1of pp collisions at √s = 7 TeV using the ATLAS detector at the LHC. The search is performed in events with large missing transverse momentum and a ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · September 17, 2012
A search for the Standard Model Higgs boson in proton-proton collisions with the ATLAS detector at the LHC is presented. The datasets used correspond to integrated luminosities of approximately 4.8 fb -1 collected at s=7 TeV in 2011 and 5.8 fb -1 at s=8 Te ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · September 17, 2012
This Letter presents evidence for the associated production of a W boson and a top quark using 2.05 fb−1 of pp collision data at s=7TeV accumulated with the ATLAS detector at the LHC. The analysis is based on the selection of the dileptonic final states wi ...
Full textCite
Journal ArticleEuropean Physical Journal C · September 13, 2012
The results of a search for the production of second generation scalar leptoquarks are presented for final states consisting of either two muons and at least two jets or a muon plus missing transverse momentum and at least two jets. A total of 1.03 fb ...
Full textCite
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, ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticleJournal of High Energy Physics · September 1, 2012
A search for flavour changing neutral current (FCNC) processes in top-quark decays by the ATLAS Collaboration is presented. Data collected from pp collisions at the LHC at a centre-of-mass energy of √s = 7 TeV during 2011, corresponding to an integrated lu ...
Full textCite
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). ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · August 14, 2012
A search for production of supersymmetric particles in final states containing jets, missing transverse momentum, and at least one hadronically decaying τ lepton is presented. The data were recorded by the ATLAS experiment in s=7TeV proton-proton collision ...
Full textCite
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 ...
Full textCite
Journal ArticleJournal of High Energy Physics · August 6, 2012
The results of a search for charged Higgs bosons are presented. The analysis is based on 4.6 fb?1 of proton-proton collision data at √s = 7TeV collected by the ATLAS experiment at the Large Hadron Collider, using top quark pair events with a τ lepton in th ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · August 2, 2012
A combined search for the Standard Model Higgs boson with the ATLAS detector at the LHC is presented. The data sets used correspond to integrated luminosities from 4.6fb-1 to 4.9fb-1 of proton-proton collisions collected at √s=7TeV in 2011. The Higgs boson ...
Full textCite
Journal ArticlePhysical review letters · August 2012
This Letter presents a search for tb resonances in 1.04 fb(-1) of LHC proton-proton collision data collected by the ATLAS detector at a center-of-mass energy of 7 TeV. Events with a lepton, missing transverse momentum, and two jets are selected and the inv ...
Full textCite
Journal ArticlePhysical review letters · August 2012
A search is reported for the pair production of a new quark b' with at least one b' decaying to a Z boson and a bottom quark. The data, corresponding to 2.0 fb(-1) of integrated luminosity, were collected from pp collisions at √s = 7 TeV with the ATLAS det ...
Full textCite
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 ...
Full textCite
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 by a neural network al ...
Full textCite
Journal ArticleJournal of High Energy Physics · July 1, 2012
Results are presented of a search for new particles decaying to large numbers of jets in association with missing transverse momentum, using 4.7 fb-1 of pp collision data at √s = 7 TeV collected by the ATLAS experiment at the Large Hadron Collider in 2011. ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · June 25, 2012
A generic search is presented for a heavy particle decaying to WZ → ℓν′ ℓ ′ (ℓ, ℓ′ = e, μ)final states. The data were recorded by the ATLAS detector in ffiffiffis √ s = 7 TeV pp collisions at the Large Hadron Collider and correspond to an integrated lumino ...
Full textCite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · June 15, 2012
The results of a search for supersymmetry in events with large missing transverse momentum and heavy-flavor jets using an integrated luminosity corresponding to 2.05fb-1 of pp collisions at √s=7TeV recorded with the ATLAS detector at the Large Hadron Colli ...
Full textCite
Journal ArticlePhysical review letters · June 2012
A search for the weak production of charginos and neutralinos decaying to a final state with three leptons (electrons or muons) and missing transverse momentum is presented. The analysis uses 2.06 fb(-1) of √[s]=7 TeV proton-proton collision data delivered ...
Full textCite
Journal ArticlePhysical review letters · June 2012
A search is presented for gluinos decaying via the supersymmetric partner of the top quark using events with two same-sign leptons, jets, and missing transverse momentum. The analysis is performed with 2.05 fb(-1) of integrated luminosity from pp collisio ...
Full textCite
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*- ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 during Run II o ...
Full textCite
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 ...
Full textCite
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. We i ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · 2012
A search for a heavy Standard Model Higgs boson decaying via H→ZZ→ℓ+ℓ-qq̄, where ℓ=e or μ, is presented. The search uses a data set of pp collisions at s=7TeV, corresponding to an integrated luminosity of 4.7fb-1 collected in 2011 by the ATLAS detector at t ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · 2012
A measurement of the cross section of top quark pair production in proton-proton collisions recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 7 TeV is reported. The data sample used corresponds to an integrated lum ...
Full textCite
Journal ArticleNuclear Physics B · 2012
The b-hadron production cross section is measured with the ATLAS detector in pp collisions at s=7TeV, using 3.3pb -1 of integrated luminosity, collected during the 2010 LHC run. The b-hadrons are selected by partially reconstructing D z.ast;+μ -X final sta ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · 2012
This Letter presents a search for singly produced vector-like quarks, Q, coupling to light quarks, q. The search is sensitive to both charged current (CC) and neutral current (NC) processes, pp→Qq→Wqq' and pp→Qq→Zqq' with a leptonic decay of the vector gau ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · 2012
This Letter reports a measurement of the WW production cross section in √s=7 TeV pp collisions using data corresponding to an integrated luminosity of 1.02 fb-1 collected with the ATLAS detector. Using leptonic decays of oppositely charged W bosons, the to ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · 2012
A blind analysis searching for the decay Bs0→μ+μ- has been performed using proton-proton collisions at a centre-of-mass energy of 7 TeV recorded with the ATLAS detector at the LHC. With an integrated luminosity of 2.4 fb-1 no excess of events over the back ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · 2012
A search for the Standard Model Higgs boson in the H→WW({star operator})→ℓνℓν (ℓ=e, μ) decay mode is presented. The search is performed using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb-1 at a centre-of-mass energy of 7 ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · 2012
The results of a search for pair production of the lighter scalar partners of top quarks (t~1) in 2.05 fb-1 of pp collisions at s=7 TeV using the ATLAS experiment at the LHC are reported. Scalar top quarks are searched for in events with two same flavour o ...
Full textCite
Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · 2012
A search for events with large missing transverse momentum, jets, and at least two tau leptons has been performed using 2 fb-1 of proton-proton collision data at s=7 TeV recorded with the ATLAS detector at the Large Hadron Collider. No excess above the Sta ...
Full textCite
Journal ArticleEuropean Physical Journal C · January 1, 2012
A search for a fermiophobic Higgs boson using diphoton events produced in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV is performed using data corresponding to an integrated luminosity of 4.9 fb−1collected by the ATLAS experiment at th ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2012
In this paper, a measurement of τ polarization in W→τν decays is presented. It is measured from the energies of the decay products in hadronic τ decays with a single final state charged particle. The data, corresponding to an in ...
Full textCite
Journal ArticleThe European physical journal. C, Particles and fields · January 2012
A measurement of the jet activity in [Formula: see text] events produced in proton-proton collisions at a centre-of-mass energy of 7 TeV is presented, using 2.05 fb-1 of integrated luminosity collected by the ATLAS detector at the Large Hadron C ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 1, 2012
A search for resonant production of high-mass top-quark pairs is performed on 2.05 fb-1 of proton-proton collisions at √s = 7 TeV collected in 2011 with the ATLAS experiment at the Large Hadron Collider. This analysis of the lepton+jets final state is spec ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 1, 2012
A search for the Standard Model Higgs boson decaying into a pair of τ leptons is reported. The analysis is based on a data sample of proton-proton collisions collected by the ATLAS experiment at the LHC and corresponding to an integrated luminosity of 4.7f ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 1, 2012
This paper presents measurements of the polarization ofW bosons in top quark decays, derived from tt̄ events with missing transverse momentum, one charged lepton and at least four jets, or two charged leptons and at least two jets. Data from pp collisions a ...
Full textCite
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 ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 1, 2012
This paper describes measurements of the sum of the transverse energy of particles as a function of particle pseudorapidity, η, in proton-proton collisions at a centre-of-mass energy, √s = 7TeV using the ATLAS detector at the Large Hadron Collider. The mea ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 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 detector. Obs ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 1, 2012
An inclusive search for anomalous production of two prompt, isolated leptons with the same electric charge is presented. The search is performed in a data sample corresponding to 4.7 fb-1 of integrated luminosity collected in 2011 at √s =7 TeV with the ATL ...
Full textCite
Journal ArticleEuropean Physical Journal C · January 1, 2012
The ATLAS detector at the LHC is used to search for high-mass states, such as heavy charged gauge bosons (Wʹ), decaying to a charged lepton (electron or muon) and a neutrino. Results are presented based on the analysis of pp collisions at a center-of-mass ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 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 the context ...
Full textCite
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 ...
Full textCite
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) ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textLink to itemCite
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 ...
Full textLink to itemCite
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 are selecte ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticleJournal of High Energy Physics · January 1, 2011
We present studies of W and Z bosons with associated high energy photons produced in pp collisions at √s = 7TeV. The analysis uses 35 pb γ + X) event candidates are selected. The kinematic distributions of the leptons and photons and the production cross s ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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, correspond to ...
Full textCite
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± ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 top-quark decays. The helicity fractions are sensitive ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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, ...
Link to itemCite
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 ...
Link to itemCite
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. ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ± ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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. ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Cite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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{ ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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, ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Link to itemCite
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. ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 1.96 TeV. We o ...
Full textCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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. ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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*+ ...
Link to itemCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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, ...
Full textCite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Link to itemCite
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- ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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, ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical review letters · November 2005
We report on a search for B0(s) --> mu+ mu- and B0(d) --> mu + mu- decays in pp collisions at square root(s) = 1.96 TeV using 364 pb(-1) of data collected by the CDF II detector at the Fermilab Tevatron Collider. After applying all selection requirements, ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical review letters · August 2005
We present a search for long-lived doubly charged Higgs bosons (H(+/- +/-)), with signatures of high ionization energy loss and muonlike penetration. We use 292 pb(-1) of data collected in pp collisions at sqrt[s] = 1.96 TeV by the CDF II detector at the F ...
Full textCite
Journal ArticlePhysical review letters · July 2005
We present a new search for H0V production, where H0 is a scalar Higgs boson decaying into bb with branching ratio beta, and V is a Z0 boson decaying into e+e-, mu+mu-, or nunu. This search is then combined with previous searches for H0V where V is a W+/- ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical review letters · June 2005
We present a measurement of the W(+)W(-) production cross section using 184 pb(-1) of p(p) collisions at a center-of-mass energy of 1.96 TeV collected with the Collider Detector at Fermilab. Using the dilepton decay channel W(+)W(-)-->l(+)nul(-), where the ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 selecting leptonic decays of the W and Z ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhys. Rev. Lett. · 2005
A search for new particles (X) that decay to electron or muon pairs has been performed using approximately 200 pb-1 of pp-bar collision data at sqrt[s]=1.96 TeV collected by the CDF II experiment at the Fermilab Tevatron. Limits on sigma (pp-bar-->X)BR(X-- ...
Link to itemCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticlePhysical Review Letters · November 2004
We present the results of a search for doubly charged
Higgs bosons (H±±) decaying to dileptons (ll') using ~
240 pb-1 of pp-bar collision data collected by the CDF II
experiment at the Fermilab Tevatron. In our search region,
given by same-sign ll' mas ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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 >= ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Full textCite
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. ...
Full textCite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 ...
Cite
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 ...
Link to itemCite
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 ...
Link to itemCite
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 the CDF detector. ...
Cite
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 ...
Link to itemCite
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 ...
Cite
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 ...
Cite
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 ...
Link to itemCite
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 ...
Full textCite
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 ...
Cite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 invariant masses between 40 and 500 ...
Cite
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 ...
Full textCite
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 ...
Cite
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. ...
Full textCite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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) ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Full textCite
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 analyzed in detail. ...
Full textCite
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 < MT < 200 GeV. In ...
Full textCite
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 boson was not i ...
Full textCite
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 ...
Full textCite
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 ...
Cite
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 ...
Cite
Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 2000
We present the results of a search for the production of light elements in (Formula presented) collisions at the Fermilab Tevatron collider. Momentum, time of flight, and (Formula presented) measurements are used to distinguish nuclei from elementary parti ...
Full textCite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Full textCite
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 technirho in the ma ...
Full textCite
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 ...
Cite
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-1 of data from the CDF experiment at Fermilab. We set a c ...
Cite
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- ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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, with an estim ...
Full textCite
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( ...
Cite
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 ...
Cite
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 contain one or ...
Full textCite
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 ...
Cite
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 semileptonic decays. The data used in th ...
Cite
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 data sample of pp¯ collisions at √ ...
Full textCite
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 ...
Cite
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 to theoretical calcul ...
Full textCite
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 ...
Full textCite
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 cross section for both mes ...
Full textCite
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 ...
Full textCite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
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 ...
Cite
Journal ArticleZeitschrift für Physik C Particles and Fields · September 1, 1995
Fermilab experiment E735 located at the CO intersection region of the {Mathematical expression} TeV {Mathematical expression} collider analysed over 900 Φ→K+K- events. Measured were the transverse momentum spectrum, the correlation between the average tran ...
Full textCite
Journal ArticlePhysics Letters B · June 22, 1995
The correlations between charged particle multiplicitie produced in forward and backward pseudorapidity regions in pp̄ interactions have been measured with a 240 element scintillator hodoscope. The correlation coefficient and the variance of the difference ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
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 ...
Full textCite
Journal ArticleNuclear Physics B (Proceedings Supplements) · January 1, 1992
The transverse momentum of charged mesons and p's produced within the pseudorapidity range of η = -0.36 to η = +1.0 and azimuthal range of φ = +2° to φ = +18° has been measured in pp collisions at √s = 1.8 TeV. The charged multiplicity of each event was me ...
Full textCite
Journal ArticleNuclear Inst. and Methods in Physics Research, A · November 15, 1991
We report the construction and testing of a 2.7 m long straw tube drift chamber consisting of 60 channels. The straw tubes with 2 mm radius are stacked in a pyramid shape up to eight tube layers. There are two wire supports inside each tube for electrostat ...
Full textCite
Journal ArticleNuclear Inst. and Methods in Physics Research, A · June 1, 1991
The design and performance of the straw drift chambers used in E735 is reported. The chambers are constructed from 2.5 cm radius aluminized mylar straw tubes with wall thickness less than 0.2 mm. Also, presented are the results of tests with 2 mm radius st ...
Full textCite
Journal ArticleNuclear Physics, Section A · January 1, 1991
We present a survey of the recent results of E-735 in its search for QGP signals at the Fermilab Collider. The basic data are the inclusive Pt distributions of centrally produced π, K, p̄ and Λ0 as a function of total charged multiplicity in the collision; ...
Full textCite
Journal ArticlePhysica Scripta · January 1, 1990
The yields and the transverse momentum distributions of pions, kaons, and antiprotons produced in the central region of pp collisions at surd;;s = 1.8 TeV at the Fermilab Tevatron collider have been measured up to a charged particle pseudo-rapidity density ...
Full textCite
Journal ArticleNuclear Physics B (Proceedings Supplements) · January 1, 1990
E-735 is designed to study charged particle production in the central region of rapidity in proton-antiproton collisions at √s = 1.8 TeV. Variations in transverse momentum and particle production ratios versus particle density are measured as a possible si ...
Full textCite
Journal ArticlePhysical Review Letters · 1989
The transverse-momentum spectra of lambdas (0, »0) produced in the central region has been measured in p»p collisions at s=1.8 TeV at the Fermilab Collider. We find that the average transverse momentum of the lambdas increases more rapidly with center-of-m ...
Full textCite
Journal ArticleNuclear Physics, Section A · January 1, 1989
E-735 is searching for signs of the quark-gluon-plasma phase transition in minimum bias proton-antiproton events. Results from the 1987 run at the Tevatron Collider at √s = 1.8TeV are presented. Included are distributions of the average Pt versus multiplic ...
Full textCite
Journal ArticleZeitschrift für Physik C Particles and Fields · September 1, 1988
A study of the properties of charm particles produced in 400 GeV/c pp interactions is reported. The experiment was performed using the high resolution hydrogen bubble chamber LEBC in association with the European Hybrid Spectrometer at the CERN SPS. Detail ...
Full textCite
Journal ArticlePhysics Letters B · January 28, 1988
Results of fitting the differential distributions in xF and pT2 of D mesons produced in 400 GeV/c p-p interactions to the form d2σ dxFdpT2∝(1-xF)n exp[-(pT2/〈pT 2〉 )] are discussed. The D+ distribution is found to be relatively hard [n=3.1±0.8〈Pt2〉=1.32±0. ...
Full textCite
Journal ArticleZeitschrift für Physik C Particles and Fields · December 1, 1987
Charm data from 360 GeV/c π-p and 400 GeV/c pp interactions are used to give results on D-meson branching ratios. The analysis is based on 438 charm events containing 608 spatially resolved charm particle decays. We present topological branching ratios, as ...
Full textCite
Journal ArticlePhysics Letters B · July 9, 1987
We present the final results on the D-meson liftime measurements obtained by the NA27 experiment. From a sample of 145 D0 D0 and 149 D± decays, we have measured τ(D0)=(4.6+0.6-0.5)×10-1 3 s, τ(D±)=(11.2+1.4-1.1)×1 0-13 s, with a ratio R= τ(D±) τ(D0)=2.4±0. ...
Full textCite
Journal ArticleZeitschrift für Physik C Particles and Fields · June 1, 1987
D-meson lifetimes have been determined from decays observed in an exposure of the high resolution hydrogen bubble chamber LEBC in association with the European Hybrid Spectrometer (EHS) to an incident 360 GeV π- beam. Various techniques for lifetime determ ...
Full textCite
Journal ArticlePhysics Letters B · May 14, 1987
We have measured the inclusive production properties of D and D messons produced from pp interactions at s=27.4 GeV. The differential production cross section is well represented by the empirical form d2σ dxFdP2T= 1 2[σ (D/D)(n+1)b](1-|xF|)n exp(-bp2T) wit ...
Full textCite
Journal ArticlePhysics Letters B · January 1, 1987
We report a measurement of the inclusive D/D̄ production cross section in 800 GeV/c proton-proton interactions. The experiment used the high resolution bubble chamber LEBC exposed to an 800 GeV/c proton beam at the Fermilab MPS. We obtain σ(D/ D ̄)=59-15+22μ ...
Full textCite
Journal ArticleZeitschrift für Physik C Particles and Fields · December 1, 1986
A study of the properties of charm particles produced in 360 GeV/c π-p interactions is reported. The experiment was performed using the high resolution hydrogen bubble chamber LEBC in association with the European Hybrid Spectrometer at the CERN SPS. Detai ...
Full textCite
Journal ArticlePhysics Letters B · September 25, 1986
Results are reported concerning the charged-particle multiplicity distribution obtained in an exposure of the high-resolution hydrogen bubble chamber LEBC to a beam of 800 GeV protons at the Fermilab MPS. This is the first time that such data have been ava ...
Full textCite
Journal ArticlePhysics Letters B · September 11, 1986
A coupled channel analysis has been carried out using a new amplitude analysis of the K0sK0s system produced in the reaction π-p→K0sK0sn at 22 GeV/c, which contained about 40 000 new events in the low-t region (|t-tmin|<0.1 GeV2). Here only the IG=0+, JPC= ...
Full textCite
Journal ArticlePhysics Letters B · February 27, 1986
Charm data from 360 GeV/c π- p interactions are used to give results on D-meson branching ratios. The analysis is based on 114 charm events containing 183 observed charm particle decays. We present topological branching ratios and decay multiplicities, as ...
Full textCite
Journal ArticlePhysics Letters B · October 31, 1985
The inclusive cross sections for forward D meson production at s=26 GeV in π-p interactions have been measured to be: σ(π-p→D0/D0+X)x F>0 = (10.1±2.2)μb, σ(π-p→D±+X)xF>0 = (5.7±1.6)μb. The distribution in xF for all D and for xF>0 has the form dσ/dxF=107-3 ...
Full textCite
Journal ArticlePhysical Review Letters · January 1, 1984
We have observed the - decay of the (1600) in the production reaction pp at 20 GeV. Using a calculation which takes into account the interference of the with the (770) and a Drell background, we find good evidence that this resonance is a radial excitation ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1984
Sixty-two charm events have been observed in an exposure of the SLAC Hybrid Facility toa backward sacttered laser beam. Based on 22 neutral and 21 charged decays we have measured the charmed-meson lifetimes to be D0=(6.8-1.8+2.3) ×10-13 sec, D±=(7.4-2.0+2. ...
Full textCite
Journal ArticlePhysical Review Letters · January 1, 1983
Forty-seven charm events have been observed in an exposure of the SLAC Hybrid Facility bubble chamber to a 20-GeV backward-scattered laser beam. Thirty-seven events survive all the necessary cuts imposed. Based on this number the total charm cross section ...
Full textCite
Journal ArticleNuclear Instruments and Methods · May 15, 1982
A large lead glass shower detector containing 204 lead glass blocks and 250 finger hodoscope elements has been constructed and operated in a photoproduction experiment at the SLAC Hybrid facility. An energy resolution of σE/E = (0.84+4.8/E 1 2)% has been a ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1982
In this paper we examine the correlation between neutral and charged pions mainly at 200 GeV/c in proton collisions. The events are divided into diffractive and nondiffractive categories. With this separation, the correlation between neutral and charged pi ...
Full textCite
Journal ArticlePhysical Review Letters · January 1, 1982
Eleven neutral and nine charged decays of charmed particles have been observed in a sample of 205 000 hadronic interactions in a 1.2-million-picture exposure of the SLAC Hybrid Facility bubble chamber to a 20-GeV/c backward-scattered laser beam. The charge ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1981
We have made a measurement of very-low-energy e+e- pair production from p collisions at 18 GeV/c. Using the SLAC 1-m bubble chamber to study a sample of 178×103 interactions, we find a signal of centrally produced direct e+e- pairs which accounts for (4813 ...
Full textCite
Journal ArticleNuclear Physics, Section B · 1980
Inclusive cross sections for π0, Ks0, Λ0 and Λ0 production in 100, 200 and 360 GeV/c π-p interactions are presented and compared with data at other energies. Invariant cross sections for γ, Ks0, Λ0 and Λ0 production are presented in terms of Feynman x, the ...
Cite
Journal ArticleNuclear Physics, Section B · January 1, 1980
Inclusive cross sections for π0, Ks0, Λ0 and Λ0 production in 100, 200 and 360 GeV/c π-p interactions are presented and compared with data at other energies. Invariant cross sections for γ, Ks0, Λ0 and Λ0 production are presented in terms of Feynman x, the ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1979
Inclusive and semi-inclusive cross sections for gp0 production in 100, 200, and 360 GeV/c π-p interactions are presented. Differential cross sections for ρ0 production as functions of c.m. rapidity and transverse momentum are compared with the correspondin ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1979
We apply the quark-recombination model to the low-pT + and - production data in -p interactions at 200 GeV/c. We find that the known quark distributions in the proton can account for the pion production in the backward hemisphere. We then obtain informatio ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1979
We present a systematic study of Δ++ production in π-p reactions at Fermilab energies. Inclusive and semi-inclusive Δ++(1232) production cross sections are determined. We observe these cross sections to be energy independent. The invariant cross sections a ...
Full textCite
Journal ArticlePhysical Review Letters · January 1, 1979
We have studied inclusive photon production from +p interactions at 10.5 GeV/c and found a source of centrally produced direct photons which accounts for (469)% of all photons detected with PL* and PT between 0 and 20 MeV/c. The experimental data are found ...
Full textCite
Journal ArticleNuclear Physics, Section B · April 3, 1978
A study of multiparticle rapidity clustering is made using a generalized rapidity-gap method. The data for events with ≥6 charged particles are compared to what would be expected from uncorrelated particle production. We find clear evidence for cluster pro ...
Full textCite
Journal ArticleNuclear Physics, Section B · February 13, 1978
Measurements of the differential multiplicity cross sections, σ(N, n0), where N is the charged multiplicity and n0 is the π0 multiplicity, are reported for π-p interactions at 10.5 GeV/c and for π+p interactions at 10.5 and 15 GeV/c. These cross sections a ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1978
For nondiffractive π-p interactions at high energy we find that the dependence of the cross section on charge multiplicity in each c.m. hemisphere exhibits Koba-Nielsen-Olesen scaling. We use this behavior to extract a cross section for diffractive excitat ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1978
We have measured the Compton electron spectrum coming from photons produced from the decays of π0 mesons. The production rate agrees well with that predicted from the Klein-Nishina formula. The agreement, expressed as a ratio R between the predicted and th ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1978
Inclusive γ and π0 production is studied in π+p interactions at 10.5 GeV/c. The π0 distributions are compared to those of π+ and π- mesons. An examination of the γ-γ mass spectrum confirms the relationship σ(π0)=σ(γ)2 to an accuracy of 10%. π0 multipliciti ...
Full textCite
Journal ArticleNuclear Physics, Section B · January 1, 1978
The production of apparent three-particle rapidity correlations from a convolution of real two-particle correlations is studied. Aside from these spurious correlations, a small but statistically significant "real" three-particle correlation is observed for ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1977
We report the results of a search for the hadronic production of unexpected, long-lived, neutral particles (such as neutrinos) in 10.5-GeV/c π+-proton interactions. This is done by directly measuring the momentum carried away by gamma rays, K0's, Λ0's, and ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1977
Detailed studies of +Ne and -Ne interactions at 10.5 GeV/c have been carried out. Multiplicities, correlations, and inclusive momentum and rapidity spectra for +, -, 0, and p are reported. Average multiplicities for K0 and 0 production are also determined. ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1977
The production of Δ++(1232) is investigated inclusively and semi-inclusively, and is compared with that of protons. We find differences in the Feynman x distributions for Δ's and protons near x=-1.0, which can be attributed to different exchange contributi ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1976
We present inclusive cross sections (Q) for charge transfers between c.m. hemispheres in -p interactions at 205 GeV/c. Plotting (Q)inelastic for different reactions and energies against Q-Q appears to yield a universal symmetric function which would result ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1976
We study the charge structure on the rapidity axis for particles produced by 200-GeV/c π-p interactions, with the charge-zone technique. We observe a constant density of zones around zero rapidity in the center-of-mass frame, perhaps indicating the saturat ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1976
The processes π-p→(neutral hadron) +X and π-Ne→(neutral hadron) +X at 200 GeV/c have been studied and compared by examining the secondary collisions of neutral hadrons in a bubble chamber. The results are satisfactorily explained in terms of n and n̄ produc ...
Full textCite
Journal ArticlePhysical Review Letters · January 1, 1976
Direct evidence is presented showing a universal decrease of charge exchange |ΔQ|>1 as a function of rapidity-gap length, independent of multiplicity and rapidity position within an event. The region over which charge exchange does occur (the "charge-mobil ...
Full textCite
Journal ArticlePhysical Review Letters · January 1, 1976
Two-particle correlations are studied as a function of t12, the square of the difference of the four-momentum of the particles. We observe that the π-π- correlation differs from the π-π+ correlation only at low values of t12. This difference can quantitati ...
Full textCite
Journal ArticleNuclear Physics, Section B · January 27, 1975
Results on the channels K-p → Λ0η0, Λ0π0, Σ0π0, Λ0π0π0 and Σ0π0π0 are obtained in a K-p formation experiment using 1 million photographs taken in a heavy liquid bubble chamber filled with a CF3BrC3H8 mixture. The results are compared with hydrogen bubble c ...
Full textCite
Journal ArticlePhysical Review Letters · January 1, 1975
We have studied direct electron-positron pair production by the collision of 200-GeV - mesons with a neon target. The data consist of 622 direct pairs with momenta ranging from 10 MeV/c to 7.5 GeV/c. We have measured the total production rate to an accurac ...
Full textCite
Journal ArticlePhysical Review Letters · January 1, 1975
We have measured the multiplicities of pions produced in the collisions of π mesons with neon nuclei at bombarding momenta of 10.5 and 200 GeV/c. The diffractive production of pions is clearly separable. If one excludes the diffractive part, the pion multi ...
Full textCite
Journal ArticlePhysical Review Letters · January 1, 1975
Significant two-particle correlations of dynamical origin are observed in 200 GeV/c π-p inclusive interactions. This is demonstrated by comparison with kinematic correlations calculated from an independent-particle-emission model. Two distinct correlation ...
Full textCite
Journal ArticleNuclear Physics, Section B · November 5, 1973
A study has been made of the individual channels that contribute to the reaction K-p → Λ0 + neutrals in the K- momentum range from 525 to 820 MeV/c. Total cross sections are presented for the K-p → Λ0η0, Σ0Σ0π0, Λ0π0, Σ0π0 and Σ0π0 π0 channels and differen ...
Full textCite
Journal ArticleNuclear Physics, Section B · November 1, 1970
In a recently completed experiment using 3.54 GeV/c K+ mesons in the BNL 80-inch chamber, we have investigated the two-prong plus one or two VO topology for events with associated production. We find no evidence for any production of any hypercharge 2 stat ...
Full textCite
Journal ArticlePhysical Review D · January 1, 1970
We extend Franco's treatment of dd elastic scattering by including the quadrupole deformation of the deuteron. We present the results of numerical computations of the cross sections at 2.2 and 7.9 GeV/c, where comparison with experimental results is possib ...
Full textCite
Journal ArticleNuclear Physics, Section B · 1970
In a recently completed experiment using 3.54 GeV/c K+ mesons in the BNL 80-inch chamber, we have investigated the two-prong plus one or two VO topology for events with associated production. We find no evidence for any production of any hypercharge 2 stat ...
Cite
Journal ArticlePhysical Review Letters · January 1, 1970
Differential scattering data have been obtained in bubble-chamber exposures and are compared with theoretical predictions using the Glauber multiple-scattering theory. The effect of the quadrupole deformation of the deuteron and the influence of the variou ...
Full textCite
Journal ArticlePhysical Review Letters · January 1, 1970
Pion pair production is studied in the pure state of isospin T=0 using the reaction dd→ddππ in a bubble chamber experiment. The data are compared in detail with a one-pion-exchange and a Reggeized one-pion-exchange model including proper Bose symmetrizatio ...
Full textCite
Journal ArticlePhysical Review Letters · December 1, 1969
The elastic and total cross sections for deuteron-deuteron interactions at 680, 920, 1180, 1500, 1750, and 2120 MeV/c are presented. The data are compared with theoretical calculations and shown to be in qualitative agreement with predictions based on the ...
Full textCite
Journal ArticleNuclear Physics, Section B · February 15, 1969
An analysis is made of K+ proton interactions in which three or four pions are produced. The experiment was conducted in the Brookhaven 80-inch bubble chamber using an incident beam of 3.5 GeV/c K+ mesons. Events of the type K+ + p → Ko + p + (3 or 4π)+ we ...
Full textCite
Journal ArticleNuclear Physics, Section B · February 15, 1969
In a recently completed experiment using 3.54 GeV/c K+ mesons in the BNL 80″ chamber, we have investigated the two prong + Vo topology for resonance production. We have found evidence for the K*(1300) with a narrow width with Kππ decay modes and the K*(140 ...
Full textCite
Journal ArticleNuclear Physics, Section B · 1969
In a recently completed experiment using 3.54 GeV/c K+ mesons in the BNL 80″ chamber, we have investigated the two prong + Vo topology for resonance production. We have found evidence for the K*(1300) with a narrow width with Kππ decay modes and the K*(140 ...
Cite
Journal ArticlePhysics Letters · August 15, 1966
An experiment has been completed in which we looked at the reaction K+ + p → Ko + π+ + π- + π+ + p using 3.52 GeV/c K+ mesons in the BNL 80″ chamber. This type of reaction produced a high yield of k's for an incoming K+ of 3.0 GeV/c. No evidence is found o ...
Full textCite