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Measurement of the underlying event activity at the LHC with root s=7 TeV and comparison with root s=0.9 TeV
CMS Collaboration
2011
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号9
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要A measurement of the underlying activity in events with a jet of transverse momentum in the several GeV region is performed in proton-proton collisions at root s = 0.9 and 7 TeV, using data collected by the CMS experiment at the LHC. The production of charged particles with pseudorapidity vertical bar eta vertical bar < 2 and transverse momentum p(T) > 0.5 GeV = c is studied in the azimuthal region transverse to that of the leading set of charged particles forming a track-jet. A significant growth of the average multiplicity and scalar-p(T) sum of the particles in the transverse region is observed with increasing p(T) of the leading track-jet, followed by a much slower rise above a few GeV/c. For track-jet p(T) larger than a few GeV/c, the activity in the transverse region is approximately doubled with a centre-of-mass energy increase from 0.9 to 7 TeV. Predictions of several QCD-inspired models as implemented in PYTHIA are compared to the data.
关键词TEVATRON PHYSICS
学科领域Physics
DOI10.1007/JHEP09(2011)109
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000296086700034
引用统计
被引频次:35[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/311005/213121
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 activity at the LHC with root s=7 TeV and comparison with root s=0.9 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2011(9).
APA CMS Collaboration.(2011).Measurement of the underlying event activity at the LHC with root s=7 TeV and comparison with root s=0.9 TeV.JOURNAL OF HIGH ENERGY PHYSICS(9).
MLA CMS Collaboration."Measurement of the underlying event activity at the LHC with root s=7 TeV and comparison with root s=0.9 TeV".JOURNAL OF HIGH ENERGY PHYSICS .9(2011).
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