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https://hdl.handle.net/2440/88740
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Type: | Journal article |
Title: | A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at √s = 7 TeV |
Other Titles: | A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at root s = 7 TeV |
Author: | ATLAS collaboration, |
Citation: | The Journal of High Energy Physics, 2012; 2012(9):139-0-139-36 |
Publisher: | Springer |
Issue Date: | 2012 |
ISSN: | 1029-8479 1029-8479 |
Statement of Responsibility: | The ATLAS collaboration |
Abstract: | A search for flavour changing neutral current (FCNC) processes in top-quark decays by the ATLAS Collaboration is presented. Data collected from pp collisions at the LHC at a centre-of-mass energy of s root=7TeV during 2011, corresponding to an integrated luminosity of 2.1 fb -1, were used. A search was performed for top-quark pair-production events, with one top quark decaying through the t -> Zq FCNC (q = u, c) channel, and the other through the Standard Model dominant mode t -> W b. Only the decays of the Z boson to charged leptons and leptonic W -boson decays were considered as signal. Consequently, the final-state topology is characterised by the presence of three isolated charged leptons, at least two jets and missing transverse momentum from the undetected neutrino. No evidence for an FCNC signal was found. An upper limit on the t -> Zq branching ratio of BR(t -> Zq) < 0.73% is set at the 95% confidence level. |
Keywords: | Hadron Hadron Scattering; Top Physics; Rare Decays; Flavour Changing Neutral Currents |
Description: | ATLAS Collaboration Contributor: M. White for the University of Adelaide. |
Rights: | Open Access, Copyright CERN, for the benefit of the ATLAS collaboration. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. |
DOI: | 10.1007/JHEP09(2012)139 |
Published version: | http://dx.doi.org/10.1007/JHEP09(2012)139 |
Appears in Collections: | Aurora harvest 7 Physics publications |
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hdl_88740.pdf | Published version | 789.82 kB | Adobe PDF | View/Open |
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