Non-flow correlations and elliptic flow fluctuations in Au plus Au collisions at root s(NN)=200 GeV

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52795

Title:	Non-flow correlations and elliptic flow fluctuations in Au plus Au collisions at root s(NN)=200 GeV
Authors:	Alver,B;Back,BB;Baker,MD;Ballintijn,M;Barton,DS;Betts,RR;Bickley,AA;Bindel,R;Busza,W;Carroll,A;Chai,Z;Decowski,MP;Garcia,E;Gburek,T;George,N;Gulbrandsen,K;Halliwell,C;Hamblen,J;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,T;Loizides,C;Manly,S;Mignerey,AC;Nouicer,R;Olszewski,A;Pak,R;Reed,C;Roland,C;Roland,G;Sagerer,J;Seals,H;Sedykh,I;Smith,CE;Stankiewicz,MA;Steinberg,P;Stephans,GSF;Sukhanov,A;Tonjes,MB;Trzupek,A;Vale,C;van Nieuwenhuizen,GJ;Vaurynovich,SS;Verdier,R;Veres,GI;Walters,P;Wenger,E;Wolfs,FLH;Wosiek,B;Wozniak,K;Wyslouch,B
Contributors:	物理學系
Keywords:	COLLABORATION
Date:	2010
Issue Date:	2012-06-11 10:44:27 (UTC+8)
Publisher:	國立中央大學
Abstract:	This article presents results on event-by-event elliptic flow fluctuations in Au+Au collisions at root s(NN) = 200 GeV, where the contribution from non-flow correlations has been subtracted. An analysis method is introduced to measure non-flow correlations, relying on the assumption that non-flow correlations are most prominent at short ranges (vertical bar Delta eta vertical bar<2). Assuming that non-flow correlations are of the order that is observed in p+p collisions for long-range correlations (vertical bar Delta eta vertical bar>2), relative elliptic flow fluctuations of approximately 30-40% are observed. These results are consistent with predictions based on spatial fluctuations of the participating nucleons in the initial nuclear overlap region. It is found that the long-range non-flow correlations in Au+Au collisions would have to be more than an order of magnitude stronger compared to the p+p data to lead to the observed azimuthal anisotropy fluctuations with no intrinsic elliptic flow fluctuations.
Relation:	PHYSICAL REVIEW C
Appears in Collections:	[物理學系] 期刊論文

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