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Measurement of the W boson polarization in top quark decays with the ATLAS detector
ATLAS collaboration
2012
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号6
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
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.
关键词ANOMALOUS WTB COUPLINGS COLLISIONS LHC TEV
学科领域Physics
DOI10.1007/JHEP06(2012)088
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
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
专题实验物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
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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