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# Search for Flavor-Changing Neutral Currents in Top-Quark Decays t→Zq in pp Collisions at √s=8  TeV

Chatrchyan, S. , The CMS Collaboration (2014) Search for Flavor-Changing Neutral Currents in Top-Quark Decays t→Zq in pp Collisions at √s=8  TeV. Physical Review Letters, 112 (17), [171802].

Record type: Article

## Abstract

A search for flavor-changing neutral currents in top-quark decays t→Zq is performed in events produced from the decay chain t¯t→Zq+Wb, where both vector bosons decay leptonically, producing a final state with three leptons (electrons or muons). A data set collected with the CMS detector at the LHC is used, corresponding to an integrated luminosity of 19.7  fb−1 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→Zq branching fraction greater than 0.05% at the 95% confidence level.

Published date: 2 May 2014
Organisations: Physics & Astronomy

## Identifiers

Local EPrints ID: 411074
URI: http://eprints.soton.ac.uk/id/eprint/411074
ISSN: 1079-7114
PURE UUID: bf7c71b6-532d-4c4c-8a37-9f49466ed95b
ORCID for Alexander Belyaev: orcid.org/0000-0002-1733-4408

## Catalogue record

Date deposited: 13 Jun 2017 16:33

## Contributors

Author: S. Chatrchyan
Corporate Author: The CMS Collaboration