Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at root s=7 TeV with the ATLAS experiment
ATLAS Collaboration
刊名EUROPEAN PHYSICAL JOURNAL C
2012
卷号72期号:5
关键词HADRONIC COLLISIONS PAIR PRODUCTION MONTE-CARLO DECAY
学科分类Physics
DOI10.1140/epjc/s10052-012-2001-6
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math Phys, Fribourg, Switzerland.
英文摘要This paper describes an analysis of the angular distribution of W -> e nu and W -> mu nu decays, using data from pp collisions at root s = 7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb(-1). Using the decay lepton transverse momentum and the missing transverse momentum, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f(0), f(L) and f(R) over two ranges of W transverse momentum (p(T)(W)) : 35 < p(T)(W) < 50 GeV and p(T)(W) > 50 GeV. Good agreement is found with theoretical predictions. For p(T)(W) > 50 GeV, the values of f(0) and f(L) - f(R), averaged over charge and lepton flavour, are measured to be: f(0) = 0.127 +/- 0.030 +/- 0.108 and f(L) - f(R) = 0.252 +/- 0.017 +/- 0.030, where the first uncertainties are statistical, and the second include all systematic effects.
类目[WOS]Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000304778800023
引用统计
被引频次:6[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/311005/213252
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 polarisation of W bosons produced with large transverse momentum in pp collisions at root s=7 TeV with the ATLAS experiment[J]. EUROPEAN PHYSICAL JOURNAL C,2012,72(5).
APA ATLAS Collaboration.(2012).Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at root s=7 TeV with the ATLAS experiment.EUROPEAN PHYSICAL JOURNAL C,72(5).
MLA ATLAS Collaboration."Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at root s=7 TeV with the ATLAS experiment".EUROPEAN PHYSICAL JOURNAL C 72.5(2012).
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