Elliptic flow at SPS and RHIC: from kinetic transport to hydrodynamics

被引：401

作者：

Kolb, PF ^{[1
]}

Huovinen, P

Heinz, U

Heiselberg, H

机构：

[1] CERN, Div Theoret Phys, CH-1211 Geneva 23, Switzerland

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[3] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[5] NORDITA, DK-2100 Copenhagen 0, Denmark

来源：

PHYSICS LETTERS B | 2001年 / 500卷 / 3-4期

关键词：

relativistic heavy-ion collisions; elliptic flow;

D O I：

10.1016/S0370-2693(01)00079-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Anisotropic transverse flow is studied in Pb + Pb and Au + Au collisions at SPS and RHIC energies, The centrality and transverse momentum dependence at midrapidity of the elliptic flow coefficient nu (2) is calculated in the hydrodynamic and low density limits. Hydrodynamics is found to agree well with the RHIC data for semicentral collisions up to transverse momenta of 1-1.5 GeV/c, but it considerably overestimates the measured elliptic how at SPS energies. The low density limit LDL is inconsistent with the measured magnitude of nu (2) at RHIC energies and with the shape of its p(t)-dependence at both RHIC and SPS energies. The success of the hydrodynamic model points to very rapid thermalization in Au + Au collisions at RHIC and provides a serious challenge for kinetic approaches based on classical scattering of on-shell particles. (C) 2001 Published by Elsevier Science B.V.

引用

页码：232 / 240

页数：9

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