Search for flavour-changing neutral current top-quark decays to qZ in pp collision data collected with the ATLAS detector at at √s=8 TeV

ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)
110 Downloads (Pure)

Abstract

A search for the flavour-changing neutral-current decay $t\to qZ$ is presented. Data collected by the ATLAS detector during 2012 from proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of $\sqrt{s}=8$ TeV, corresponding to an integrated luminosity of 20.3 fb$^{-1}$, are analysed. Top-quark pair-production events with one top quark decaying through the $t\to qZ$ ($q=u,c$) channel and the other through the dominant Standard Model mode $t\to bW$ are considered as signal. Only the decays of the $Z$ boson to charged leptons and leptonic $W$ boson decays are used. No evidence for a signal is found and an observed (expected) upper limit on the $t\to qZ$ branching ratio of $7\times 10^{-4}$ ($8\times 10^{-4}$) is set at the 95% confidence level.
Original languageEnglish
JournalEur. Phys. J. C
Volume76
Issue number12
DOIs
Publication statusE-pub ahead of print - 8 Jan 2016

Bibliographical note

19 pages plus author list (35 pages total), 4 figures, 9 tables, published version, all figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2014-08/

Keywords

  • hep-ex

Fingerprint

Dive into the research topics of 'Search for flavour-changing neutral current top-quark decays to qZ in pp collision data collected with the ATLAS detector at at √s=8 TeV'. Together they form a unique fingerprint.

Cite this