Search for heavy vector-like quarks coupling to light quarks in proton–proton collisions at √s = 7 TeV with the ATLAS detector
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Aad-2012-Searcy for heavy vector.pdf
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Author(s)
Taylor, Frank E.
Date Issued
April 2012
Journal
Physics Letters B
Publisher
Elsevier
Citation
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, A.A. Abdelalim, A. Abdesselam, O. Abdinov, et al. “Search for Heavy Vector-Like Quarks Coupling to Light Quarks in Proton–proton Collisions at √s = 7 TeV with the ATLAS Detector.” Physics Letters B 712, no. 1–2 (May 2012): 22–39. © 2012 CERN
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Final published version
Abstract
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 gauge boson. In 1.04 fb[superscript −1] of data taken in 2011 by the ATLAS experiment at a center-of-mass energy √s = 7 TeV, no evidence of such heavy vector-like quarks is observed above the expected Standard Model background. Limits on the heavy vector-like quark production cross section times branching ratio as a function of mass m[subscript Q] are obtained. For a coupling κ[subscript qQ] = [v over m[subscript Q]], where v is the Higgs vacuum expectation value, 95% C.L. lower limits on the mass of a vector-like quark are set at 900 GeV and 760 GeV from CC and NC processes, respectively.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2012.03.082
