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	Parton distributions at hadronization from bulk dense matter produced in Au plus Au collisions at root sNN=200 GeV
	Chen, J. H. ; Jin, F. ; Gangadharan, D. ; Cai, X. Z. ; Huang, H. Z. ; Ma, Y. G.
	2010-05-10 ; 2010-05-10
关键词	QUARK-GLUON PLASMA HEAVY-ION COLLISIONS MONTE-CARLO MODEL COLLABORATION PERSPECTIVE Physics, Nuclear
中文摘要	We present an analysis of Omega, Xi, Lambda, and phi spectra from Au+Au collisions at root sNN = 200 GeV in terms of distributions of effective constituent quarks at hadronization. Consistency in quark ratios derived from various hadron spectra provides clear evidence for hadron formation dynamics as suggested by quark coalescence or recombination models. We argue that the constituent quark distribution reflects properties of the effective partonic degree of freedom at hadronization. Experimental data indicate that strange quarks have a transverse-momentum distribution flatter than that of up/down quarks consistent with hydrodynamic expansion in partonic phase prior to hadronization. Our extracted parton transverse-momentum distributions at the hadronization provide a unique constraint on the partonic evolution history. After the multiphase transport model is tuned to reproduce the strange and up/down quark distributions, the model can describe the measured spectra of hyperons and phi mesons very well where hadrons are formed through dynamical coalescence.
语种	英语 ; 英语
出版者	AMER 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/123456789/22252]
专题	清华大学
推荐引用方式 GB/T 7714	Chen, J. H.,Jin, F.,Gangadharan, D.,et al. Parton distributions at hadronization from bulk dense matter produced in Au plus Au collisions at root sNN=200 GeV[J],2010, 2010.
APA	Chen, J. H.,Jin, F.,Gangadharan, D.,Cai, X. Z.,Huang, H. Z.,&Ma, Y. G..(2010).Parton distributions at hadronization from bulk dense matter produced in Au plus Au collisions at root sNN=200 GeV..
MLA	Chen, J. H.,et al."Parton distributions at hadronization from bulk dense matter produced in Au plus Au collisions at root sNN=200 GeV".(2010).

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