Scholars@Duke publication: Search for pair production of heavy top-like quarks decaying to a high-p<inf>T</inf> W boson and a b quark in the lepton plus jets final state at √s=7 TeV with the ATLAS detector

Search for pair production of heavy top-like quarks decaying to a high-pT W boson and a b quark in the lepton plus jets final state at √s=7 TeV with the ATLAS detector

Publication , Journal Article

Aad, G; Abajyan, T; Abbott, B; Abdallah, J; Abdel Khalek, S; Abdelalim, AA; Abdinov, O; Aben, R; Abi, B; Abolins, M; AbouZeid, OS; Abreu, H ...

Published in: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

January 29, 2013

Published version (DOI)

A search is presented for production of a heavy up-type quark (t′) together with its antiparticle, assuming a significant branching ratio for subsequent decay into a W boson and a b quark. The search is based on 4.7 fb−1 of pp collisions at s=7 TeV recorded in 2011 with the ATLAS detector at the CERN Large Hadron Collider. Data are analyzed in the lepton + jets final state, characterized by a high-transverse-momentum isolated electron or muon, large missing transverse momentum and at least three jets. The analysis strategy relies on the substantial boost of the W bosons in the t′t¯′ signal when mt′≳400 GeV. No significant excess of events above the Standard Model expectation is observed and the result of the search is interpreted in the context of fourth-generation and vector-like quark models. Under the assumption of a branching ratio BR(t′→Wb)=1, a fourth-generation t′ quark with mass lower than 656 GeV is excluded at 95% confidence level. In addition, in light of the recent discovery of a new boson of mass ∼126 GeV at the LHC, upper limits are derived in the two-dimensional plane of BR(t′→Wb) versus BR(t′→Ht), where H is the Standard Model Higgs boson, for vector-like quarks of various masses.

Duke Scholars

Author Alfred T. Goshaw Physics

Author Mark C. Kruse Physics

Author Ayana T. Arce Physics

Author Ashutosh V. Kotwal Physics

Author Seog Oh Physics

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Published In

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

DOI

10.1016/j.physletb.2012.11.071

ISSN

0370-2693

Publication Date

January 29, 2013

Volume

718

Issue

4-5

Start / End Page

1284 / 1302

Related Subject Headings

Nuclear & Particles Physics
51 Physical sciences
49 Mathematical sciences
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
0201 Astronomical and Space Sciences
0105 Mathematical Physics

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Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdelalim, A. A., … Arik, E. (2013). Search for pair production of heavy top-like quarks decaying to a high-pT W boson and a b quark in the lepton plus jets final state at √s=7 TeV with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 718(4–5), 1284–1302. https://doi.org/10.1016/j.physletb.2012.11.071

Aad, G., T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, A. A. Abdelalim, O. Abdinov, et al. “Search for pair production of heavy top-like quarks decaying to a high-pT W boson and a b quark in the lepton plus jets final state at √s=7 TeV with the ATLAS detector.” Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 718, no. 4–5 (January 29, 2013): 1284–1302. https://doi.org/10.1016/j.physletb.2012.11.071.

Aad G, Abajyan T, Abbott B, Abdallah J, Abdel Khalek S, Abdelalim AA, et al. Search for pair production of heavy top-like quarks decaying to a high-pT W boson and a b quark in the lepton plus jets final state at √s=7 TeV with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2013 Jan 29;718(4–5):1284–302.

Aad, G., et al. “Search for pair production of heavy top-like quarks decaying to a high-pT W boson and a b quark in the lepton plus jets final state at √s=7 TeV with the ATLAS detector.” Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 718, no. 4–5, Jan. 2013, pp. 1284–302. Scopus, doi:10.1016/j.physletb.2012.11.071.

Aad G, Abajyan T, Abbott B, Abdallah J, Abdel Khalek S, Abdelalim AA, Abdinov O, Aben R, Abi B, Abolins M, AbouZeid OS, Abramowicz H, Abreu H, Acharya BS, Adamczyk L, Adams DL, Addy TN, Adelman J, Adomeit S, Adragna P, Adye T, Aefsky S, Aguilar-Saavedra JA, Agustoni M, Aharrouche M, Ahlen SP, Ahles F, Ahmad A, Ahsan M, Aielli G, Åkesson TPA, Akimoto G, Akimov AV, Alam MS, Alam MA, Albert J, Albrand S, Aleksa M, Aleksandrov IN, Alessandria F, Alexa C, Alexander G, Alexandre G, Alexopoulos T, Alhroob M, Aliev M, Alimonti G, Alison J, Allbrooke BMM, Allport PP, Allwood-Spiers SE, Almond J, Aloisio A, Alon R, Alonso A, Alonso F, Altheimer A, Alvarez Gonzalez B, Alviggi MG, Amako K, Amelung C, Ammosov VV, Amor Dos Santos SP, Amorim A, Amram N, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders G, Anderson KJ, Andreazza A, Andrei V, Andrieux ML, Anduaga XS, Angelidakis S, Anger P, Angerami A, Anghinolfi F, Anisenkov A, Anjos N, Annovi A, Antonaki A, Antonelli M, Antonov A, Antos J, Anulli F, Aoki M, Aoun S, Aperio Bella L, Apolle R, Arabidze G, Aracena I, Arai Y, Arce ATH, Arfaoui S, Arguin JF, Argyropoulos S, Arik E. Search for pair production of heavy top-like quarks decaying to a high-pT W boson and a b quark in the lepton plus jets final state at √s=7 TeV with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2013 Jan 29;718(4–5):1284–1302.

Published In

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

DOI

10.1016/j.physletb.2012.11.071

ISSN

0370-2693

Publication Date

January 29, 2013

Volume

718

Issue

4-5

Start / End Page

1284 / 1302

Related Subject Headings

Nuclear & Particles Physics
51 Physical sciences
49 Mathematical sciences
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
0201 Astronomical and Space Sciences
0105 Mathematical Physics