Charged and strange hadron elliptic flow in Cu plus Cu collisions at root s(NN)=62.4 and 200 GeV

doi:10.1103/PhysRevC.81.044902

CORC > 近代物理研究所 > 中国科学院近代物理研究所 > 近代物理研究所知识存储（2010之前）

	Charged and strange hadron elliptic flow in Cu plus Cu collisions at root s(NN)=62.4 and 200 GeV
	Li, W.50; Li, N.9 ; Xu, Z.12 ; Xu, Y.48; Xu, W.15; Xu, Q. H.49; Xu, N.31 ; Xie, W.43; Wu, Y.9; Witt, R.55
刊名	PHYSICAL REVIEW C
	2010-04-01
卷号	81 期号:4 页码:14
ISSN号	0556-2813
DOI	10.1103/PhysRevC.81.044902
英文摘要	We present the results of an elliptic flow, v(2), analysis of Cu + Cu collisions recorded with the solenoidal tracker detector (STAR) at the BNL Relativistic Heavy Ion Collider at root s(NN) = 62.4 and 200 GeV. Elliptic flow as a function of transverse momentum, v(2)(p(T)), is reported for different collision centralities for charged hadrons h(+/-) and strangeness-ontaining hadrons K-S(0), Lambda, Xi, and phi in the midrapidity region vertical bar eta vertical bar < 1.0. Significant reduction in systematic uncertainty of the measurement due to nonflow effects has been achieved by correlating particles at midrapidity, vertical bar eta vertical bar < 1.0, with those at forward rapidity, 2.5 < vertical bar eta vertical bar < 4.0. We also present azimuthal correlations in p + p collisions at root s = 200 GeV to help in estimating nonflow effects. To study the system-size dependence of elliptic flow, we present a detailed comparison with previously published results from Au + Au collisions at root s(NN) = 200 GeV. We observe that v(2)(p(T)) of strange hadrons has similar scaling properties as were first observed in Au + Au collisions, that is, (i) at low transverse momenta, p(T) < 2 GeV/c, v(2) scales with transverse kinetic energy, m(T) - m, and (ii) at intermediate p(T), 2 < p(T) < 4 GeV/c, it scales with the number of constituent quarks, n(q.) We have found that ideal hydrodynamic calculations fail to reproduce the centrality dependence of v(2)(p(T)) for K-S(0) and Lambda. Eccentricity scaled v(2) values, v(2)/epsilon, are larger in more central collisions, suggesting stronger collective flow develops in more central collisions. The comparison with Au + Au collisions, which go further in density, shows that v(2)/epsilon depends on the system size, that is, the number of participants N-part. This indicates that the ideal hydrodynamic limit is not reached in Cu + Cu collisions, presumably because the assumption of thermalization is not attained.
资助项目	US DOE Office of Science ; US NSF ; Sloan Foundation ; DFG ; CNRS[CNRS/IN2P3] ; STFC ; EPSRC of the United Kingdom ; FAPESP CNPq of Brazil ; Ministry of Education and Science of the Russian Federation ; NNSFC ; CAS ; MoST ; MoE of China ; GA and MSMT of the Czech Republic ; FOM and NWO of the Netherlands ; DAE ; DST ; CSIR of India ; Polish Ministry of Science and Higher Education ; Korea Research Foundation ; Ministry of Science, Education and Sports of the Republic of Croatia ; Russian Ministry of Science and Technology ; RosAtom of Russia
WOS关键词	QUARK-GLUON PLASMA ; HEAVY-ION COLLISIONS ; RELATIVISTIC NUCLEAR COLLISIONS ; PHI-MESON PRODUCTION ; ANISOTROPIC FLOW ; PHASE-TRANSITION ; CENTRALITY DEPENDENCE ; SIGNATURE ; STAR ; COLLABORATION
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000277209500057
资助机构	US DOE Office of Science ; US NSF ; Sloan Foundation ; DFG ; CNRS ; STFC ; EPSRC of the United Kingdom ; FAPESP CNPq of Brazil ; Ministry of Education and Science of the Russian Federation ; NNSFC ; CAS ; MoST ; MoE of China ; GA and MSMT of the Czech Republic ; FOM and NWO of the Netherlands ; DAE ; DST ; CSIR of India ; Polish Ministry of Science and Higher Education ; Korea Research Foundation ; Ministry of Science, Education and Sports of the Republic of Croatia ; Russian Ministry of Science and Technology ; RosAtom of Russia
公开日期	2011-04-20
内容类型	期刊论文
源URL	[http://ir.imp.cas.cn/handle/113462/7895]
专题	近代物理研究所_近代物理研究所知识存储（2010之前）
通讯作者	Shi, S. S.
作者单位	1.Michigan State Univ, E Lansing, MI 48824 USA 2.Univ Zagreb, HR-10002 Zagreb, Croatia 3.Yale Univ, New Haven, CT 06520 USA 4.Wayne State Univ, Detroit, MI 48201 USA 5.Univ Washington, Seattle, WA 98195 USA 6.Warsaw Univ Technol, Warsaw, Poland 7.Ctr Variable Energy Cyclotron, Kolkata 700064, India 8.Valparaiso Univ, Valparaiso, IN 46383 USA 9.CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China 10.Argonne Natl Lab, Argonne, IL 60439 USA
推荐引用方式 GB/T 7714	Li, W.,Li, N.,Xu, Z.,et al. Charged and strange hadron elliptic flow in Cu plus Cu collisions at root s(NN)=62.4 and 200 GeV[J]. PHYSICAL REVIEW C,2010,81(4):14.
APA	Li, W..,Li, N..,Xu, Z..,Xu, Y..,Xu, W..,...&Xue, L..(2010).Charged and strange hadron elliptic flow in Cu plus Cu collisions at root s(NN)=62.4 and 200 GeV.PHYSICAL REVIEW C,81(4),14.
MLA	Li, W.,et al."Charged and strange hadron elliptic flow in Cu plus Cu collisions at root s(NN)=62.4 and 200 GeV".PHYSICAL REVIEW C 81.4(2010):14.