Search for flavor changing neutral currents in top quark decays in pp collisions at 7 TeV
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The results of a search for flavor changing neutral currents in top quark decays t→Zq in events with a topology compatible with the decay chain tt¯→Wb+Zq→ℓνb+ℓℓq are presented. The search is performed with a data sample corresponding to an integrated luminosity of 5.0 fb[superscript −1] of proton–proton collisions at a center-of-mass energy of 7 TeV, collected with the CMS detector at the LHC. The observed number of events agrees with the standard model prediction and no evidence for flavor changing neutral currents in top quark decays is found. A t→Zq branching fraction greater than 0.21% is excluded at the 95% confidence level.
Date issued
2012-12Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. School of ScienceJournal
Physics Letters B
Publisher
Elsevier
Citation
Chatrchyan, S., V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, E. Aguilo, T. Bergauer, et al. “Search for Flavor Changing Neutral Currents in Top Quark Decays in Pp Collisions at 7 TeV.” Physics Letters B 718, no. 4–5 (January 2013): 1252–1272. © 2012 CERN
Version: Final published version
ISSN
03702693