Recent results from PHOBOS on particle production at high p(T)

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题名:	Recent results from PHOBOS on particle production at high p(T)
作者:	Alver,B;Back,BB;Baker,MD;Ballintijn,M;Barton,DS;Betts,RR;Bickley,AA;Bindel,R;Busza,W;Carroll,A;Chai,Z;Chetluru,V;Decowski,MP;Garcia,E;Gburek,T;George,N;Gulbrandsen,K;Halliwell,C;Hamblen,J;Harnarine,I;Hauer,M;Henderson,C;Hofman,DJ;Hollis,RS;Holynski,R;Holzman,B;Iordanova,A;Johnson,E;Kane,JL;Khan,N;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;Seals,H;Sedykh,I;Smith,CE;Stankiewicz,MA;Steinberg,P;Stephans,GSF;Sukhanov,A;Szostak,A;Tonjes,MB;Trzupek,A;Vale,C;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
关键词:	ROOT-S(NN)=200 GEV;AU+AU COLLISIONS;SUPPRESSION;STAR
日期:	2009
上传时间:	2010-07-08 14:00:44 (UTC+8)
出版者:	中央大學
摘要:	A selection of experimental results from the PHOBOS Collaboration relevant for probing high-energy nuclear collisions with high transverse momentum particles is presented. The inclusive yields of charged particles and comparisons between nuclear and elementary collisions already reveal a large amount of parton energy loss in the hot and dense medium created in heavy ion collisions. Remarkable scaling and factorization features are observed, unifying the data taken at various collision energies, centralities and nuclear sizes. To further analyze the nature of the energy loss, a measurement of pseudorapidity (Delta eta) and azimuthal angle (Delta phi) correlations between high transverse momentum charged hadrons (p(T) > 2.5 GeV/c) and all associated charged particles is presented at both short-range (small Delta eta) and long-range (large Delta eta) over a continuous detector acceptance covering-4 < Delta eta < 2. Various near-and away-side features of the correlation structure are discussed as a function of centrality in Au+Au collisions at root s(NN) = 200 GeV. The results provide new information about the longitudinal (Delta eta) extent of the near-side 'ridge' structure, first observed by the STAR Collaboration over a narrower eta range. In central Au+Au collisions the ridge structure extends to at least Delta eta = 4, and its strength completely diminishes as collisions become more peripheral.
關聯:	EUROPEAN PHYSICAL JOURNAL C
显示于类别:	[物理研究所] 期刊論文

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