Article Dans Une Revue Physical Review Letters Année : 2014

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

S. Chatrchyan
  • Fonction : Auteur
P. Busson
C. Mironov
P. Paganini
J.-L. Agram
E. Conte
D. Contardo

Résumé

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.

Dates et versions

in2p3-00919538 , version 1 (17-12-2013)

Identifiants

Citer

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, 2014, 112, pp.171802. ⟨10.1103/PhysRevLett.112.171802⟩. ⟨in2p3-00919538⟩
56 Consultations
0 Téléchargements

Altmetric

Partager

  • More