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
ATLAS collaboration
刊名JOURNAL OF HIGH ENERGY PHYSICS
2012
期号9
关键词EP COLLISIONS P(P)OVER-BAR COLLISIONS SUPERSYMMETRIC MODELS E(+)E(-) COLLISIONS DOUBLET MODELS HERA FCNC LHC PERFORMANCE COUPLINGS
学科分类Physics
DOI10.1007/JHEP09(2012)139
通讯作者Woudstra, MJ (reprint author), CERN, Geneva, Switzerland.
英文摘要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.
类目[WOS]Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000310341200001
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被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213367
专题中国科学院高能物理研究所_实验物理中心_期刊论文
作者单位中国科学院高能物理研究所
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ATLAS collaboration. 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[J]. JOURNAL OF HIGH ENERGY PHYSICS,2012(9).
APA ATLAS collaboration.(2012).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.JOURNAL OF HIGH ENERGY PHYSICS(9).
MLA ATLAS collaboration."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".JOURNAL OF HIGH ENERGY PHYSICS .9(2012).
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