Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at root s=7 TeV with the ATLAS detector
2012 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 712, no 1-2, 22-39 p.Article in journal (Refereed) Published
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 root 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(Q) are obtained. For a coupling K-qQ = v/m(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. (C) 2012 CERN.
Place, publisher, year, edition, pages
2012. Vol. 712, no 1-2, 22-39 p.
IdentifiersURN: urn:nbn:se:su:diva-80306DOI: 10.1016/j.physletb.2012.03.082ISI: 000304742500005OAI: oai:DiVA.org:su-80306DiVA: diva2:555545