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Multiplicity and transverse momentum dependence of two- and four-particle correlations in pPb and PbPb collisions
CMS Collaboration
2013
发表期刊PHYSICS LETTERS B
卷号724期号:4--5页码:213-240
通讯作者Alverson, G (reprint author), Northeastern Univ, Boston, MA 02115 USA.
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.
关键词RELATIVISTIC NUCLEAR COLLISIONS ANGULAR-CORRELATIONS ROOT-S(NN)=2.76 TEV LONG-RANGE FLOW COLLABORATION EXPANSION SIDE
学科领域Physics
DOI10.1016/j.physletb.2013.06.028
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000322358500005
引用统计
被引频次:250[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/311005/213571
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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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.
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