Scaling properties in bulk and p(T)-dependent particle production near midrapidity in relativistic heavy ion collisions

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题名:	Scaling properties in bulk and p(T)-dependent particle production near midrapidity in relativistic heavy ion collisions
作者:	Alver,B;Back,BB;Baker,MD;Ballintijn,M;Barton,DS;Betts,RR;Bindel,R;Busza,W;Chai,Z;Chetluru,V;Garcia,E;Gburek,T;Gulbrandsen,K;Hamblen,J;Harnarine,I;Henderson,C;Hofman,DJ;Hollis,RS;Holynski,R;Holzman,B;Iordanova,A;Kane,JL;Kulinich,P;Kuo,CM;Li,W;Lin,WT;Loizides,C;Manly,S;Mignerey,AC;Nouicer,R;Olszewski,A;Pak,R;Reed,C;Richardson,E;Roland,C;Roland,G;Sagerer,J;Sedykh,I;Smith,CE;Stankiewicz,MA;Steinberg,P;Stephans,GSF;Sukhanov,A;Szostak,A;Tonjes,MB;Trzupek,A;van Nieuwenhuizen,GJ;Vaurynovich,SS;Verdier,R;Veres,G;Walters,P;Wenger,E;Willhelm,D;Wolfs,FLH;Wosiek,B;Wozniak,K;Wyngaardt,S;Wyslouch,B
贡献者:	物理研究所
关键词:	NUCLEAR COLLISIONS;PHOBOS;DETECTOR
日期:	2009
上传时间:	2010-07-08 14:00:46 (UTC+8)
出版者:	中央大學
摘要:	The centrality dependence of the midrapidity charged-particle multiplicity density (vertical bar eta vertical bar < 1) is presented for Au+Au and Cu+Cu collisions at RHIC over a broad range of collision energies. The multiplicity measured in the Cu+Cu system is found to be similar to that measured in the Au+Au system, for an equivalent N-part, with the observed factorization in energy and centrality still persistent in the smaller Cu+Cu system. The extent of the similarities observed for bulk particle production is tested by a comparative analysis of the inclusive transverse momentum distributions for Au+Au and Cu+Cu collisions near midrapidity. It is found that, within the uncertainties of the data, the ratio of yields between the various energies for both Au+Au and Cu+Cu systems are similar and constant with centrality, both in the bulk yields and as a function of p(T), up to at least 4 GeV/c. The effects of multiple nucleon collisions that strongly increase with centrality and energy appear to only play a minor role in bulk and intermediate transverse momentum particle production.
關聯:	PHYSICAL REVIEW C
显示于类别:	[物理研究所] 期刊論文

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