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	Elliptic flow analysis in Au plus Au collisions at root s(NN)=200 GeV: Fluctuations vs non-flow effects
	Zhu, XL ; Bleicher, M ; Stocker, H
	2010-05-06 ; 2010-05-06
关键词	RELATIVISTIC NUCLEAR COLLISIONS CENTRALITY DEPENDENCE SIGNATURE Physics, Nuclear
中文摘要	The cumulant method is applied to study elliptic flow (v(2)) in Au+Au collisions at root s = 200A GeV, with the UrQMD model. In this approach, the true event plane is known and both the nonflow effects and event-by-event spatial (epsilon) and v(2) fluctuations exist. Qualitatively, the hierarchy of v(2)s from two-, four-, and six-particle cumulants is consistent with the STAR data; however, the magnitude of v(2) in the UrQMD model is only 60% of the data. We find that the four- and six-particle cumulants are good measures of the real elliptic flow over a wide range of centralities except for the most central and very peripheral events. There the cumulant method is affected by the v(2) fluctuations. In midcentral collisions, the four- and six-particle cumulants are shown to give a good estimation of the true differential v(2), especially at large transverse momentum, where the two-particle cumulant method is heavily affected by the nonflow effects.
语种	英语 ; 英语
出版者	AMERICAN PHYSICAL SOC ; COLLEGE PK ; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/15135]
专题	清华大学
推荐引用方式 GB/T 7714	Zhu, XL,Bleicher, M,Stocker, H. Elliptic flow analysis in Au plus Au collisions at root s(NN)=200 GeV: Fluctuations vs non-flow effects[J],2010, 2010.
APA	Zhu, XL,Bleicher, M,&Stocker, H.(2010).Elliptic flow analysis in Au plus Au collisions at root s(NN)=200 GeV: Fluctuations vs non-flow effects..
MLA	Zhu, XL,et al."Elliptic flow analysis in Au plus Au collisions at root s(NN)=200 GeV: Fluctuations vs non-flow effects".(2010).

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