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    题名: System Size, Energy, and Centrality Dependence of Pseudorapidity Distributions of Charged Particles 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,GI;Walters,P;Wenger,E;Willhelm,D;Wolfs,FLH;Wosiek,B;Wozniak,K;Wyngaardt,S;Wyslouch,B
    贡献者: 物理研究所
    日期: 2009
    上传时间: 2010-07-08 14:01:15 (UTC+8)
    出版者: 中央大學
    摘要: We present the first measurements of the pseudorapidity distribution of primary charged particles in Cu+Cu collisions as a function of collision centrality and energy, s(NN)>=22.4, 62.4, and 200 GeV, over a wide range of pseudorapidity, using the PHOBOS detector. A comparison of Cu+Cu and Au+Au results shows that the total number of produced charged particles and the rough shape (height and width) of the pseudorapidity distributions are determined by the number of nucleon participants. More detailed studies reveal that a more precise matching of the shape of the Cu+Cu and Au+Au pseudorapidity distributions over the full range of pseudorapidity occurs for the same N-part/2A rather than the same N-part. In other words, it is the collision geometry rather than just the number of nucleon participants that drives the detailed shape of the pseudorapidity distribution and its centrality dependence at RHIC energies.
    關聯: PHYSICAL REVIEW LETTERS
    显示于类别:[物理研究所] 期刊論文

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