Search for heavy vector-like quarks coupling to light quarks in proton–proton collisions at s = 7 TeV with the ATLAS detector
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 1.04fb-1 of data taken in 2011 by the ATLAS experiment at a center-of-mass energy √s=7TeV, 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.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- Contributing Organization:
- ATLAS Collaboration
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1212555
- Alternate ID(s):
- OSTI ID: 1380121
- Report Number(s):
- SLAC-PUB-17009; S0370269312003802; PII: S0370269312003802
- Journal Information:
- Physics Letters B, Vol. 712, Issue 1-2; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
Web of Science
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