Measurement of the Pseudorapidity and Centrality Dependence of the Transverse Energy Density in Pb-Pb Collisions at root s(NN)=2.76 TeV

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	Measurement of the Pseudorapidity and Centrality Dependence of the Transverse Energy Density in Pb-Pb Collisions at root s(NN)=2.76 TeV
	CMS Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2012
卷号	109 期号:15
关键词	NUCLEUS-NUCLEUS COLLISIONS COLOR GLASS CONDENSATE QUARK-GLUON PLASMA AU PLUS AU PION-PRODUCTION COLLABORATION MODEL PERSPECTIVE PARTICLE
通讯作者	Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要	The transverse energy (E-T) in Pb-Pb collisions at 2.76 TeV nucleon-nucleon center-of-mass energy (root s(NN)) has been measured over a broad range of pseudorapidity (eta) and collision centrality by using the CMS detector at the LHC. The transverse energy density per unit pseudorapidity (dE(T)/d eta) increases faster with collision energy than the charged particle multiplicity. This implies that the mean energy per particle is increasing with collision energy. At all pseudorapidities, the transverse energy per participating nucleon increases with the centrality of the collision. The ratio of transverse energy per unit pseudorapidity in peripheral to central collisions varies significantly as the pseudorapidity increases from eta = 0 to vertical bar eta vertical bar = 5.0. For the 5% most central collisions, the energy density per unit volume is estimated to be about 14 GeV/fm(3) at a time of 1 fm/c after the collision. This is about 100 times larger than normal nuclear matter density and a factor of 2.6 times higher than the energy density reported at root s(NN) = 200 GeV at the Relativistic Heavy Ion Collider.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000309589900002
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213338]
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. Measurement of the Pseudorapidity and Centrality Dependence of the Transverse Energy Density in Pb-Pb Collisions at root s(NN)=2.76 TeV[J]. PHYSICAL REVIEW LETTERS,2012,109(15).
APA	CMS Collaboration.(2012).Measurement of the Pseudorapidity and Centrality Dependence of the Transverse Energy Density in Pb-Pb Collisions at root s(NN)=2.76 TeV.PHYSICAL REVIEW LETTERS,109(15).
MLA	CMS Collaboration."Measurement of the Pseudorapidity and Centrality Dependence of the Transverse Energy Density in Pb-Pb Collisions at root s(NN)=2.76 TeV".PHYSICAL REVIEW LETTERS 109.15(2012).