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

Author(s)
Taylor, Frank E
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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[superscript −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[superscript −4] (8×10[superscript −4]) is set at the 95 % confidence level
Date issued
2016-01
URI
http://hdl.handle.net/1721.1/106525
Department
Massachusetts Institute of Technology. Department of Physics
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
ATLAS Collaboration et al. “Search for Flavour-Changing Neutral Current Top-Quark Decays to QZ in PP Collision Data Collected with the ATLAS Detector at √s = 8 TeV.” The European Physical Journal C 76.1 (2016): n. pag. © 2016 CERN for the benefit of the ATLAS collaboration
Version: Final published version
ISSN
1434-6044
1434-6052

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