Measurement of the W boson polarization in top quark decays with the ATLAS detector
ATLAS collaboration
刊名JOURNAL OF HIGH ENERGY PHYSICS
2012
期号6
关键词ANOMALOUS WTB COUPLINGS COLLISIONS LHC TEV
学科分类Physics
DOI10.1007/JHEP06(2012)088
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
英文摘要This paper presents measurements of the polarization of W bosons in top quark decays, derived from t (t) over bar events with missing transverse momentum, one charged lepton and at least four jets, or two charged leptons and at least two jets. Data from pp collisions at a centre-of-mass energy of 7 TeV were collected with the ATLAS experiment at the LHC and correspond to an integrated luminosity of 1.04 fb(-1). The measured fractions of longitudinally, left-and right-handed polarization are F-0 = 0.67 +/- 0.07, F-L = 0.32 +/- 0.04 and F-R = 0.01 +/- 0.05, in agreement with the Standard Model predictions. As the polarization of the W bosons in top quark decays is sensitive to the Wtb vertex Lorentz structure and couplings, the measurements were used to set limits on anomalous contributions to the Wtb couplings.
类目[WOS]Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000306416500089
引用统计
被引频次:18[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/311005/213284
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. Measurement of the W boson polarization in top quark decays with the ATLAS detector[J]. JOURNAL OF HIGH ENERGY PHYSICS,2012(6).
APA ATLAS collaboration.(2012).Measurement of the W boson polarization in top quark decays with the ATLAS detector.JOURNAL OF HIGH ENERGY PHYSICS(6).
MLA ATLAS collaboration."Measurement of the W boson polarization in top quark decays with the ATLAS detector".JOURNAL OF HIGH ENERGY PHYSICS .6(2012).
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