Mass, quark-number, and √sNN dependence of the second and fourth flow harmonics in ultrarelativistic nucleus-nucleus collisions

被引：122

作者：

Abelev, B. I. ^{[1
]}

Aggarwal, M. M.

Ahammed, Z.

Anderson, B. D.

Arkhipkin, D.

Averichev, G. S.

Bai, Y.

Balewski, J.

Barannikova, O.

Barnby, L. S.

Baudot, J.

Baumgart, S.

Bekele, S.

Belaga, V. V.

Bellingeri-Laurikainen, A.

Bellwied, R.

Benedosso, F.

Betts, R. R.

Bhardwaj, S.

Bhasin, A.

Bhati, A. K.

Bichsel, H.

Bielcik, J.

Bielcikova, J.

Bland, L. C.

Blyth, S-L.

Bombara, M.

Bonner, B. E.

Botje, M.

Bouchet, J.

Brandin, A. V.

Bravar, A.

Burton, T. P.

Bystersky, M.

Cadman, R. V.

Cai, X. Z.

Caines, H.

Sanchez, M. Calderon de la Barca

Callner, J.

Castillo, J.

Catu, O.

Cebra, D.

Chajecki, Z.

Chaloupka, P.

Chattopadhyay, S.

Chen, H. F.

Chen, J. H.

Cheng, J.

Cherney, M.

Chikanian, A.

机构：

[1] Yale Univ, New Haven, CT 06520 USA

[2] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[3] Univ Illinois, Chicago, IL USA

[4] Creighton Univ, Omaha, NE 68178 USA

[5] Acad Sci Czech Republ, Inst Nucl Phys, CZ-25068 Rez, Czech Republic

[6] JINR, Lab High Energy, Dubna, Russia

[7] JINR, Particle Phys Lab, Dubna, Russia

[8] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany

[9] Inst Phys, Bhubaneswar 751005, Orissa, India

[10] Indian Inst Technol, Bombay 400076, Maharashtra, India

[11] Indiana Univ, Bloomington, IN 47408 USA

[12] Inst Rech Subatom, Strasbourg, France

[13] Univ Jammu, Jammu 180001, India

[14] Kent State Univ, Kent, OH 44242 USA

[15] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[16] Inst Modern Phys, Lanzhou, Peoples R China

[17] MIT, Cambridge, MA 02139 USA

[18] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[19] Michigan State Univ, E Lansing, MI 48824 USA

[20] Moscow Engn Phys Inst, Moscow 115409, Russia

[21] CUNY City Coll, New York, NY 10031 USA

[22] NIKHEF H, NL-1009 DB Amsterdam, Netherlands

[23] Univ Utrecht, Utrecht, Netherlands

[24] Ohio State Univ, Columbus, OH 43210 USA

[25] Panjab Univ, Chandigarh 160014, India

[26] Penn State Univ, University Pk, PA 16802 USA

[27] Inst High Energy Phys, Protvino, Russia

[28] Purdue Univ, W Lafayette, IN 47907 USA

[29] Pusan Natl Univ, Pusan 609735, South Korea

[30] Univ Rajasthan, Jaipur 302004, Rajasthan, India

[31] Rice Univ, Houston, TX 77251 USA

[32] Univ Sao Paulo, Sao Paulo, Brazil

[33] Univ Sci & Technol China, Hefei 230026, Peoples R China

[34] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[35] SUBATECH, Nantes, France

[36] Texas A&M Univ, College Stn, TX 77843 USA

[37] Univ Texas, Austin, TX 78712 USA

[38] Tsinghua Univ, Beijing 100084, Peoples R China

[39] Valparaiso Univ, Valparaiso, IN 46383 USA

[40] Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India

[41] Warsaw Univ Technol, Warsaw, Poland

[42] Univ Washington, Seattle, WA 98195 USA

[43] Wayne State Univ, Detroit, MI 48201 USA

[44] HZNU, CCNU, Inst Particle Phys, Wuhan 430079, Peoples R China

[45] Univ Zagreb, HR-10002 Zagreb, Croatia

[46] Argonne Natl Lab, Argonne, IL 60439 USA

[47] Brookhaven Natl Lab, Upton, NY 11973 USA

[48] Univ Birmingham, Birmingham, W Midlands, England

[49] CALTECH, Pasadena, CA 91125 USA

[50] Univ Calif Berkeley, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW C | 2007年 / 75卷 / 05期

关键词：

D O I：

10.1103/PhysRevC.75.054906

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We present STAR measurements of the azimuthal anisotropy parameter v(2) for pions, kaons, protons, Lambda,(Lambda) over bar,Xi+ (Xi) over bar, and Omega+ (Omega) over bar, along with v(4) for pions, kaons, protons, and Lambda+(Lambda) over bar at midrapidity for Au+Au collisions at root s(NN)=62.4 and 200 GeV. The v(2)(p(T)) values for all hadron species at 62.4 GeV are similar to those observed in 130 and 200 GeV collisions. For observed kinematic ranges, v(2) values at 62.4, 130, and 200 GeV are as little as 10-15% larger than those in Pb+Pb collisions at root s(NN)=17.3 GeV. At intermediate transverse momentum (p(T) from 1.5-5 GeV/c), the 62.4 GeV v(2)(p(T)) and v(4)(p(T)) values are consistent with the quark-number scaling first observed at 200 GeV. A four-particle cumulant analysis is used to assess the nonflow contributions to pions and protons and some indications are found for a smaller nonflow contribution to protons than pions. Baryon v(2) is larger than antibaryon v(2) at 62.4 and 200 GeV, perhaps indicating either that the initial spatial net-baryon distribution is anisotropic, that the mechanism leading to transport of baryon number from beam- to midrapidity enhances v(2) or that antibaryon and baryon annihilation is larger in the in-plane direction.

引用

页数：11

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