# Inclusive search for a vector-like T quark with charge 2/3 in pp collisions at root s=8 TeV

Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Eroe, J.; Fabjan, C.; Friedl, M.; Fruehwirth, R.; Ghete, V. M.; Hartl, C.; Hoermann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Knuenz, V.; Krammer, M.; Kraetschmer, I.; ... mehr

Abstract:
A search is performed for a massive new vector-like quark T, with charge 23 , that is pair produced together with its antiparticle in proton&#8211;proton collisions. The data were collected by the CMS experiment at the Large Hadron Collider in 2012 at s&#8730;=8 TeV and correspond to an integrated luminosity of 19.5 fb&#8722;1 . The T quark is assumed to decay into three different final states, bW, tZ, and tH. The search is carried out using events with at least one isolated lepton. No deviations from standard model expectations are observed, and lower limits are set on the T quark mass at 95% confidence level. The lower limit lies between 687 and 782 GeV for all possible values of the branching fractions into the three different final states assuming strong production. These limits are the most stringent constraints to date on the existence of such a quark.

 Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP) Publikationstyp Zeitschriftenaufsatz Jahr 2014 Sprache Englisch Identifikator ISSN: 0370-2693KITopen ID: 1000042476 Erschienen in Physics Letters B Band 729 Seiten 149-171 Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
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