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Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC
ATLAS collaboration
2011
发表期刊NEW JOURNAL OF PHYSICS
卷号13
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hermann Herder Str 3, D-79104 Freiburg Ibr, Germany.
摘要Measurements are presented from proton-proton collisions at centre-of-mass energies of root s = 0.9, 2.36 and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-arm minimum-bias trigger. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity and the relationship between the mean transverse momentum and charged-particle multiplicity are measured. Measurements in different regions of phase space are shown, providing diffraction-reduced measurements as well as more inclusive ones. The observed distributions are corrected to well-defined phase-space regions, using model-independent corrections. The results are compared to each other and to various Monte Carlo (MC) models, including a new AMBT1 pythia6 tune. In all the kinematic regions considered, the particle multiplicities are higher than predicted by the MC models. The central charged-particle multiplicity per event and unit of pseudorapidity, for tracks with p(T) > 100 MeV, is measured to be 3.483 +/- 0.009 (stat) +/- 0.106 (syst) at root s = 0.9 TeV and 5.630 +/- 0.003 (stat) +/- 0.169 (syst) at root s = 7 TeV.
关键词TRANSVERSE-MOMENTUM SPECTRA SQUARE-ROOT-S CM ENERGIES DISTRIBUTIONS COLLISIONS COLLIDER TEV
学科领域Physics
DOI10.1088/1367-2630/13/5/053033
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000292002100003
引用统计
被引频次:139[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/311005/213070
专题实验物理中心
作者单位中国科学院高能物理研究所
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ATLAS collaboration. Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC[J]. NEW JOURNAL OF PHYSICS,2011,13.
APA ATLAS collaboration.(2011).Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC.NEW JOURNAL OF PHYSICS,13.
MLA ATLAS collaboration."Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC".NEW JOURNAL OF PHYSICS 13(2011).
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