A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at √s = 7 TeV
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A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at √s = 7 TeV

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A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at √s = 7 TeV

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dc.contributor.author ATLAS Collaboration
dc.contributor.author Mitsou, Vasiliki
dc.contributor.author Fuster Verdú, Juan A.
dc.contributor.author Ferrer Soria, Antonio
dc.contributor.author Castillo Giménez, María Victoria
dc.contributor.author Cabrera Urbán, Susana
dc.contributor.author García García, Carmen
dc.contributor.author Higón Rodríguez, Emilio
dc.contributor.author Martí García, Salvador
dc.contributor.author Ros Martínez, Eduardo
dc.contributor.author González de la Hoz, Santiago
dc.contributor.author Salt Cairols, José
dc.contributor.author Valls Ferrer, Juan Antonio
dc.contributor.author Kaci, Mohammed
dc.contributor.author Fiorini, Luca
dc.contributor.author Hernández Jiménez, Yesenia
dc.contributor.author Lacasta Llácer, Carlos
dc.date.accessioned 2014-07-23T10:19:04Z
dc.date.available 2014-07-23T10:19:04Z
dc.date.issued 2012
dc.identifier.uri http://hdl.handle.net/10550/37276
dc.description.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 root s = 7 TeV 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 -> Wb. 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.
dc.language.iso eng
dc.relation.ispartof Journal of High Energy Physics, 2012, vol. 2012, num. 09-9, p. 139 -1-139 - 37
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source ATLAS Collaboration Mitsou, Vasiliki Fuster Verdú, Juan A. Ferrer Soria, Antonio Castillo Giménez, María Victoria Cabrera Urbán, Susana García García, Carmen Higón Rodríguez, Emilio Martí García, Salvador Ros Martínez, Eduardo González de la Hoz, Santiago Salt Cairols, José Valls Ferrer, Juan Antonio Kaci, Mohammed Fiorini, Luca Hernández Jiménez, Yesenia Lacasta Llácer, Carlos 2012 A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at √s = 7 TeV Journal of High Energy Physics 2012 09-9 139 -1 139 - 37
dc.subject Física nuclear
dc.subject Partícules (Física nuclear)
dc.subject Col·lisions (Física nuclear)
dc.subject Detectors de radiació
dc.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
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-07-23T10:19:04Z
dc.identifier.doi http://dx.doi.org/10.1007/JHEP09(2012)139
dc.identifier.idgrec 083495

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