Skip to Main content Skip to Navigation
Journal articles

Search for flavor-changing neutral currents in top-quark decays t to Zq in pp collisions at sqrt(s)=8 TeV

Abstract : A search for flavor-changing neutral currents in top-quark decays t to Zq is performed in events produced from the decay chain t t-bar to Zq+Wb, where both vector bosons decay leptonically, producing a final state with three leptons (electrons or muons). A dataset collected with the CMS detector at the LHC is used, corresponding to an integrated luminosity of 19.7 inverse femtobarns of proton-proton collisions at a center-of-mass energy of 8 TeV. No excess is seen in the observed number of events relative to the standard model prediction; thus no evidence for flavor-changing neutral currents in top-quark decays is found. A combination with a previous search at 7 TeV excludes a t to Zq branching fraction greater than 0.05% at the 95% confidence level.
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00919538
Contributor : Sylvie Flores <>
Submitted on : Tuesday, December 17, 2013 - 7:34:19 AM
Last modification on : Wednesday, November 25, 2020 - 4:10:43 PM

Links full text

Identifiers

Collections

Citation

S. Chatrchyan, S. Baffioni, F. Beaudette, P. Busson, C. Charlot, et al.. Search for flavor-changing neutral currents in top-quark decays t to Zq in pp collisions at sqrt(s)=8 TeV. Physical Review Letters, American Physical Society, 2014, 112, pp.171802. ⟨10.1103/PhysRevLett.112.171802⟩. ⟨in2p3-00919538⟩

Share

Metrics

Record views

453