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	Is constituent quark scaling a unique sign of parton recombination?
	Bleicher, M. ; Zhu, X.
	2010-05-06 ; 2010-05-06
会议名称	EUROPEAN PHYSICAL JOURNAL C ; Hot Quarts Workshop on Physics of Ultral-Relativistic Nucleus-Nucleus Collisions ; Villasimius, ITALY ; Web of Science
关键词	HEAVY-ION COLLISIONS ENERGY NUCLEAR COLLISIONS PLUS AU COLLISIONS EQUATION-OF-STATE ELLIPTIC FLOW FREEZE-OUT COLLECTIVE FLOW GLUON PLASMA ANISOTROPIC FLOW PHASE Physics, Particles & Fields
中文摘要	We study the transverse momentum dependence of the anisotropic flow v(2) for pi, K, nucleon, Lambda, Xi and Omega for Au + Au collisions at root s(NN) = 200 GeV within two independent string-hadron transport approaches (RQMD and UrQMD). Although both models reach only 60% of the absolute magnitude of the measured v(2), they both predict the particle-type dependence of v(2) as observed by the RHIC experiments: v(2) exhibits a hadron-mass hierarchy in the low p(T) region and a number-of-constituent-quark (NCQ) dependence in the intermediate p(T) region. The failure of the hadronic models to reproduce the absolute magnitude of the observed v(2) indicates that transport calculations of heavy-ion collisions at RHIC must incorporate interactions among quarks and gluons in the early, hot and dense phase. The presence of an NCQ scaling in the string-hadron model results suggests that the particle-type dependences observed in heavy-ion collisions at intermediate p(T) might be related to the hadronic cross sections in vacuum rather than to the hadronization process itself.
会议录出版者	SPRINGER ; NEW YORK ; 233 SPRING STREET, NEW YORK, NY 10013 USA
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/6938]
专题	清华大学
推荐引用方式 GB/T 7714	Bleicher, M.,Zhu, X.. Is constituent quark scaling a unique sign of parton recombination?[C]. 见:EUROPEAN PHYSICAL JOURNAL C, Hot Quarts Workshop on Physics of Ultral-Relativistic Nucleus-Nucleus Collisions, Villasimius, ITALY, Web of Science.

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