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Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC
CMS Collaboration
2011
发表期刊PHYSICAL REVIEW D
卷号84期号:11
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要A multivariate likelihood method to measure electroweak couplings with the Drell-Yan process at the LHC is presented. The process is described by the dilepton rapidity, invariant mass, and decay angle distributions. The decay angle ambiguity due to the unknown assignment of the scattered constituent quark and antiquark to the two protons in a collision is resolved statistically using correlations between the observables. The method is applied to a sample of dimuon events from proton-proton collisions at root s = 7 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 1.1 fb(-1). From the dominant u (u) over bar, d (d) over bar -> gamma*/Z -> mu(-)mu(+) process, the effective weak mixing angle parameter is measured to be sin(2)theta(eff) = 0.2287 +/- 0.0020 (stat.) +/- 0.0025 (syst.) This result is consistent with measurements from other processes, as expected within the standard model.
关键词ELECTROWEAK PARAMETERS HADRON COLLISIONS PAIR PRODUCTION
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.84.112002
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000297936800001
引用统计
被引频次:22[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/311005/213151
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC[J]. PHYSICAL REVIEW D,2011,84(11).
APA CMS Collaboration.(2011).Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC.PHYSICAL REVIEW D,84(11).
MLA CMS Collaboration."Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC".PHYSICAL REVIEW D 84.11(2011).
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