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Measurement of the underlying event in the Drell-Yan process in proton-proton collisions at root s=7 TeV
CMS Collaboration
2012
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号72期号:9
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要A measurement of the underlying event (UE) activity in proton-proton collisions at a center-of-mass energy of 7 TeV is performed using Drell-Yan events in a data sample corresponding to an integrated luminosity of 2.2 fb(-1), collected by the CMS experiment at the LHC. The activity measured in the muonic final state (q (q) over bar -> mu(+) mu(-)) is corrected to the particle level and compared with the predictions of various Monte Carlo generators and hadronization models. The dependence of the UE activity on the dimuon invariant mass is well described by PYTHIA and HERWIG++ tunes derived from the leading jet/track approach, illustrating the universality of the UE activity. The UE activity is observed to be independent of the dimuon invariant mass in the region above 40 GeV/c(2), while a slow increase is observed with increasing transverse momentum of the dimuon system. The dependence of the UE activity on the transverse momentum of the dimuon system is accurately described by MADGRAPH, which simulates multiple hard emissions.
关键词FRAGMENTATION
学科领域Physics
DOI10.1140/epjc/s10052-012-2080-4
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000309707300006
引用统计
被引频次:2[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/311005/213346
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 underlying event in the Drell-Yan process in proton-proton collisions at root s=7 TeV[J]. EUROPEAN PHYSICAL JOURNAL C,2012,72(9).
APA CMS Collaboration.(2012).Measurement of the underlying event in the Drell-Yan process in proton-proton collisions at root s=7 TeV.EUROPEAN PHYSICAL JOURNAL C,72(9).
MLA CMS Collaboration."Measurement of the underlying event in the Drell-Yan process in proton-proton collisions at root s=7 TeV".EUROPEAN PHYSICAL JOURNAL C 72.9(2012).
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