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

ContributorsATLAS Collaboration
Collection
  • Open Access - SCOAP3
Publication date2016
Abstract

A search for the flavour-changing neutral-current decay t→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 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→qZ ( q=u,c ) channel and the other through the dominant Standard Model mode t→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→qZ branching ratio of 7×10-4 ( 8×10-4 ) is set at the 95 % confidence level

Citation (ISO format)
ATLAS Collaboration. Search for flavour-changing neutral current top-quark decays to qZ in pp collision data collected with the ATLAS detector at √s = 8 TeV. In: European physical journal. C, Particles and fields, 2016, vol. 76, n° 1, p. 12. doi: 10.1140/epjc/s10052-015-3851-5
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Article (Published version)
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ISSN of the journal1434-6044
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