Suppression of gamma(1S), gamma(2S), and gamma(3S) quarkonium states in PbPb collisions at root S-NN=2.76TeV

doi:10.1016/j.physletb.2017.04.031

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	Suppression of gamma(1S), gamma(2S), and gamma(3S) quarkonium states in PbPb collisions at root S-NN=2.76TeV
	CMS Collaboration
刊名	PHYSICS LETTERS B
	2017
卷号	770 页码:357-379
关键词	CMS Physics Heavy ions Dimuons Bottomonia
ISSN号	0370-2693
DOI	10.1016/j.physletb.2017.04.031
文献子类	Article
英文摘要	The production yields of gamma(1S), gamma(2S), and gamma(3S) quarkonium states are measured through their decays into muon pairs in the CMS detector, in PbPb and pp collisions at the centre-of-mass energy per nucleon pair of 2.76TeV. The data correspond to integrated luminosities of 166 mu b(-1) and 5.4 pb(-1) for PbPb and pp collisions, respectively. Differential production cross sections are reported as functions of gamma rapidity y up to 2.4, and transverse momentum PT up to 20 GeV/c. A strong centrality-dependent suppression is observed in PbPb relative to pp collisions, by factors of up to approximate to 2 and 8, for the gamma(1S) and gamma(2S) states, respectively. No significant dependence of this suppression is observed as a function of y or PT. The gamma(3S) state is not observed in PbPb collisions, which corresponds to a suppression for the centrality-integrated data by at least a factor of approximate to 7 at a 95% confidence level. The observed suppression is in agreement with theoretical scenarios modeling the sequential melting of quarkonium states in a quark gluon plasma. (C) 2017 The Author(s). Published by Elsevier B.V.
电子版国际标准刊号	1873-2445
WOS关键词	HEAVY-ION COLLISIONS ; CHARMONIUM SUPPRESSION ; NUCLEUS COLLISIONS ; PSI-SUPPRESSION ; PROTON ; LHC
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000404196500050
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284371]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	CMS Collaboration. Suppression of gamma(1S), gamma(2S), and gamma(3S) quarkonium states in PbPb collisions at root S-NN=2.76TeV[J]. PHYSICS LETTERS B,2017,770:357-379.
APA	CMS Collaboration.(2017).Suppression of gamma(1S), gamma(2S), and gamma(3S) quarkonium states in PbPb collisions at root S-NN=2.76TeV.PHYSICS LETTERS B,770,357-379.
MLA	CMS Collaboration."Suppression of gamma(1S), gamma(2S), and gamma(3S) quarkonium states in PbPb collisions at root S-NN=2.76TeV".PHYSICS LETTERS B 770(2017):357-379.