Search for flavor-changing neutral currents in top quark decays at ATLAS

Abstract

ATLAS results are presented on a search for flavor-changing neutral currents (FCNC) in top quark decays at the LHC. Events are searched for where a pair of top quarks is produced and one decays through the Standard Model $t\to Wb$ mode while the other decays through the FCNC mode $t\to qZ$. Leptonic final states are used in which both the $W$- and $Z$-bosons decay leptonically, yielding final states with three leptons and two jets. The observed events are consistent with the expected backgrounds from Drell-Yan and diboson production and a limit on the FCNC branching ratio of top quarks to $qZ$ is set.

Presented at the 2011 Hadron Collider Physics symposium (HCP-2011), Paris, France, November 14-18 2011, 3 pages, 4 figures

References in corpus (1)

• Performance of missing transverse momentum reconstruction in proton-proton collisions at 7 TeV with ATLAS

Cited by in corpus (2)

• Direct CP violation in charm and flavor mixing beyond the SM
• Minimal Flavour Violation and Anomalous Top Decays