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Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at root s=7 TeV
CMS Collaboration
2010
发表期刊PHYSICAL REVIEW LETTERS
卷号105期号:2
通讯作者Khachatryan, V (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要Charged-hadron transverse-momentum and pseudorapidity distributions in proton-proton collisions at root s = 7 TeV are measured with the inner tracking system of the CMS detector at the LHC. The charged-hadron yield is obtained by counting the number of reconstructed hits, hit pairs, and fully reconstructed charged-particle tracks. The combination of the three methods gives a charged-particle multiplicity per unit of pseudorapidity dN(ch)/d eta vertical bar(vertical bar eta vertical bar<0.5) = 5.78 +/- 0.01(stat) +/- 0.23(stat) for non-single-diffractive events, higher than predicted by commonly used models. The relative increase in charged-particle multiplicity from root s = 0.9 to 7 TeV is [66.1 +/- 1.0(stat) +/- 4.2(syst)]%. The mean transverse momentum is measured to be 0.545 +/- 0.005(stat) +/- 0.015(syst) GeV/c. The results are compared with similar measurements at lower energies.
关键词PARTICLES ENERGIES DEPENDENCE
学科领域Physics
DOI10.1103/PhysRevLett.105.022002
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000279555600002
引用统计
被引频次:367[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/311005/212955
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. Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at root s=7 TeV[J]. PHYSICAL REVIEW LETTERS,2010,105(2).
APA CMS Collaboration.(2010).Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at root s=7 TeV.PHYSICAL REVIEW LETTERS,105(2).
MLA CMS Collaboration."Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at root s=7 TeV".PHYSICAL REVIEW LETTERS 105.2(2010).
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