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Type: Journal article
Title: Search for heavy vector-like quarks coupling to light quarks in proton–proton collisions at √s = 7 TeV with the ATLAS detector
Other Titles: Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at root s = 7 TeV with the ATLAS detector
Author: Aad, G.
ATLAS Collaboration
Citation: Physics Letters B: Nuclear Physics and Particle Physics, 2012; 712(1-2):22-39
Publisher: Elsevier
Issue Date: 2012
ISSN: 0370-2693
Statement of
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... et al. (ATLAS Collaboration)
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⁻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 mQ are obtained. For a coupling κqQ=v/mQ, 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.
Rights: © 2012 CERN. Published by Elsevier B.V. Open access under CC BY-NC-ND license. []
DOI: 10.1016/j.physletb.2012.03.082
Grant ID: ARC
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