The University of Southampton
University of Southampton Institutional Repository
Warning ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

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

Search for Flavor-Changing Neutral Currents in Top-Quark Decays t→Zq in pp Collisions at √s=8  TeV
Search for Flavor-Changing Neutral Currents in Top-Quark Decays t→Zq in pp Collisions at √s=8  TeV
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.
1079-7114
Chatrchyan, S.
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Chatrchyan, S.
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

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]. (doi:10.1103/PhysRevLett.112.171802).

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.

This record has no associated files available for download.

More information

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 iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 13 Jun 2017 16:33
Last modified: 10 Nov 2021 03:19

Export record

Altmetrics

Contributors

Author: S. Chatrchyan
Corporate Author: The CMS Collaboration

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×