Event activity dependence of (nS) production in=5.02 TeV pPb and=2.76 TeV pp collisions
CMS Collaboration
刊名JOURNAL OF HIGH ENERGY PHYSICS
2014
期号4
关键词NUCLEUS-NUCLEUS COLLISIONS J-PSI-SUPPRESSION QUARKONIUM J/PSI LHC
学科分类Physics
DOI10.1007/JHEP04(2014)103
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要The production of (1S), (2S), and (3S) is investigated in pPb and pp collisions at centre-of-mass energies per nucleon pair of 5.02 TeV and 2.76 TeV, respectively. The datasets correspond to integrated luminosities of about 31 nb(-1) (pPb) and 5.4 pb(-1) (pp), collected in 2013 by the CMS experiment at the LHC. Upsilons that decay into muons are reconstructed within the rapidity interval |y (CM)| < 1.93 in the nucleon-nucleon centre-of-mass frame. Their production is studied as a function of two measures of event activity, namely the charged-particle multiplicity measured in the pseudorapidity interval |eta| < 2.4, and the sum of transverse energy deposited at forward pseudorapidity, 4.0 < |eta| < 5.2. The cross sections normalized by their event activity integrated values, (nS)/aEuro(nS)aEuro parts per thousand, are found to rise with both measures of the event activity in pp and pPb. In both collision systems, the ratios of the excited to the ground state cross sections, (nS)/ (1S), are found to decrease with the charged-particle multiplicity, while as a function of the transverse energy the variation is less pronounced. The event activity integrated double ratios, [(nS)/ (1S)](pPb) /[(nS)/ (1S)](pp), are also measured and found to be 0.83 +/- 0.05 (stat.) +/- 0.05 (syst.) and 0.71 +/- 0.08 (stat.) +/- 0.09 (syst.) for (2S) and (3S), respectively.
类目[WOS]Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000334918800001
引用统计
被引频次:30[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/311005/213698
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
作者单位中国科学院高能物理研究所
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CMS Collaboration. Event activity dependence of (nS) production in=5.02 TeV pPb and=2.76 TeV pp collisions[J]. JOURNAL OF HIGH ENERGY PHYSICS,2014(4).
APA CMS Collaboration.(2014).Event activity dependence of (nS) production in=5.02 TeV pPb and=2.76 TeV pp collisions.JOURNAL OF HIGH ENERGY PHYSICS(4).
MLA CMS Collaboration."Event activity dependence of (nS) production in=5.02 TeV pPb and=2.76 TeV pp collisions".JOURNAL OF HIGH ENERGY PHYSICS .4(2014).
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