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Study of the underlying event at forward rapidity in pp collisions at root s=0.9, 2.76, and 7 TeV
CMS Collaboration
2013
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号4
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要The underlying event activity in proton-proton collisions at forward pseudorapidity (-6.6 < eta < -5.2) is studied with the CMS detector at the LHC, using a novel observable: the ratio of the forward energy density, dE/d(eta), for events with a charged-particle jet produced at central pseudorapidity (vertical bar eta(jet)vertical bar < 2) to the forward energy density for inclusive events. This forward energy density ratio is measured as a function of the central jet transverse momentum, p(T), at three different pp centre-of-mass energies (root s = 0.9, 2.76, and 7 TeV). In addition, the root s evolution of the forward energy density is studied in inclusive events and in events with a central jet. The results are compared to those of Monte Carlo event generators for pp collisions and are discussed in terms of the underlying event. Whereas the dependence of the forward energy density ratio on jet p(T), at each root s separately can be well reproduced by some models, all models fail to simultaneously describe the increase of the forward energy density with root s in both inclusive events and in events with a central jet.
关键词CARLO GENERATOR CASCADE PERTURBATION-THEORY QCD COHERENCE PHYSICS TEVATRON CCFM LHC
学科领域Physics
DOI10.1007/JHEP04(2013)072
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000321208400072
引用统计
被引频次:39[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/311005/213557
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. Study of the underlying event at forward rapidity in pp collisions at root s=0.9, 2.76, and 7 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2013(4).
APA CMS Collaboration.(2013).Study of the underlying event at forward rapidity in pp collisions at root s=0.9, 2.76, and 7 TeV.JOURNAL OF HIGH ENERGY PHYSICS(4).
MLA CMS Collaboration."Study of the underlying event at forward rapidity in pp collisions at root s=0.9, 2.76, and 7 TeV".JOURNAL OF HIGH ENERGY PHYSICS .4(2013).
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