标题:Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at √s =7 TeV with the ATLAS experiment
作者:Aad G.; Abbott B.; Abdallah J.; Abdelalim A.A.; Abdesselam A.; Abdinov O.; Abi B.; Abolins M.;等 更多
作者机构:[Aad, G] Fakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg i.Br., Germany, CERN, 1211 Geneva 23, Switzerland;[ Abbott, B] Homer 更多
通讯作者地址:[Aad, G] Fakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg i.Br., Germany
来源:European Physical Journal C
出版年:2012
卷:72
期:5
页码:1-30
DOI:10.1140/epjc/s10052-012-2001-6
摘要:This paper describes an analysis of the angular distribution of W→eν and W→μν decays, using data from pp collisions at √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 f0, fL and fR over two ranges of W transverse momentum (pW T): 35 < pW T < 50 GeV and pW T > 50 GeV. Good agreement is found with theoretical predictions. For pW T >50 GeV, the values of f0 and fL-fR, averaged over charge and lepton flavour, are measured to be: f0=0. 127±0. 030±0. 108 and fL-fR=0. 252±0. 017±0. 030, where the first uncertainties are statistical, and the second include all systematic effects. © 2012 CERN for the benefit of the ATLAS collaboration.
收录类别:SCOPUS
Scopus被引频次:10
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84862316225&doi=10.1140%2fepjc%2fs10052-012-2001-6&partnerID=40&md5=8ab744e54e8a7af7c5f449fa7bbfa2c8
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