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dc.contributor.authorCMS Collaboration
Adair, A.
Akgun, B.
Boulahouache, C.
Ecklund, K.M.
Geurts, F.J.M.
Li, W.
Padley, B.P.
Redjimi, R.
Roberts, J.
Zabel, J. 2015-07-13T16:40:50Z 2015-07-13T16:40:50Z 2012
dc.identifier.citation CMS Collaboration, Adair, A., Akgun, B., et al.. "Search for pair produced fourth-generation up-type quarks in pp collisions at √s=7 TeV with a lepton in the final state." Physics Letters B, 718, no. 2 (2012) Elsevier: 307-328.
dc.description.abstract The results of a search for the pair production of a fourth-generation up-type quark (t′) in proton–proton collisions at √s=7 TeV are presented, using data corresponding to an integrated luminosity of about 5.0 fb−1 collected by the Compact Muon Solenoid experiment at the LHC. The t′ quark is assumed to decay exclusively to a W boson and a b quark. Events with a single isolated electron or muon, missing transverse momentum, and at least four hadronic jets, of which at least one must be identified as a b jet, are selected. No significant excess of events over standard model expectations is observed. Upper limits for the t′t¯′ production cross section at 95% confidence level are set as a function of t′ mass, and t′-quark production for masses below 570 GeV is excluded. The search is equally sensitive to nonchiral heavy quarks decaying to Wb. In this case, the results can be interpreted as upper limits on the production cross section times the branching fraction to Wb.
dc.language.iso eng
dc.publisher Elsevier
dc.rights Open access under CC BY-NC-ND license
dc.title Search for pair produced fourth-generation up-type quarks in pp collisions at √s=7 TeV with a lepton in the final state
dc.type Journal article
dc.citation.journalTitle Physics Letters B
dc.citation.volumeNumber 718
dc.citation.issueNumber 2
dc.type.dcmi Text
dc.type.publication publisher version
dc.citation.firstpage 307
dc.citation.lastpage 328

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Except where otherwise noted, this item's license is described as Open access under CC BY-NC-ND license