Multiplicity and transverse momentum dependence of two- and four-particle correlations in pPb and PbPb collisions

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	Multiplicity and transverse momentum dependence of two- and four-particle correlations in pPb and PbPb collisions
	CMS Collaboration
刊名	PHYSICS LETTERS B
	2013
卷号	724 期号:4--5 页码:213-240
关键词	RELATIVISTIC NUCLEAR COLLISIONS ANGULAR-CORRELATIONS ROOT-S(NN)=2.76 TEV LONG-RANGE FLOW COLLABORATION EXPANSION SIDE
通讯作者	Alverson, G (reprint author), Northeastern Univ, Boston, MA 02115 USA.
英文摘要	Measurements of two- and four-particle angular correlations for charged particles emitted in pPb collisions are presented over a wide range in pseudorapidity and full azimuth. The data, corresponding to an integrated luminosity of approximately 31 nb(-1), were collected during the 2013 LHC pPb run at a nucleon-nucleon center-of-mass energy of 5.02 TeV by the CMS experiment. The results are compared to 2.76 TeV semi-peripheral PbPb collision data, collected during the 2011 PbPb run, covering a similar range of particle multiplicities. The observed correlations are characterized by the near-side (vertical bar Delta phi vertical bar approximate to 0) associated pair yields and the azimuthal anisotropy Fourier harmonics (nu(n)). The second-order (nu(2)) and third-order (v(3)) anisotropy harmonics are extracted using the two-particle azimuthal correlation technique. A four-particle correlation method is also applied to obtain the value of nu(2) and further explore the multi-particle nature of the correlations. Both associated pair yields and anisotropy harmonics are studied as a function of particle multiplicity and transverse momentum. The associated pair yields, the four-particle nu(2), and the nu(3) become apparent at about the same multiplicity. A remarkable similarity in the nu(3) signal as a function of multiplicity is observed between the pPb and PbPb systems. Predictions based on the color glass condensate and hydrodynamic models are compared to the experimental results. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000322358500005
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213571]
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. Multiplicity and transverse momentum dependence of two- and four-particle correlations in pPb and PbPb collisions[J]. PHYSICS LETTERS B,2013,724(4--5):213-240.
APA	CMS Collaboration.(2013).Multiplicity and transverse momentum dependence of two- and four-particle correlations in pPb and PbPb collisions.PHYSICS LETTERS B,724(4--5),213-240.
MLA	CMS Collaboration."Multiplicity and transverse momentum dependence of two- and four-particle correlations in pPb and PbPb collisions".PHYSICS LETTERS B 724.4--5(2013):213-240.