Directed flow in Au+Au, Xe+CsI, and Ni+Ni collisions and the nuclear equation of state -: art. no. 034907

被引：69

作者：

Andronic, A ^{[1
]}

Reisdorf, W

Herrmann, N

Crochet, P

Alard, JP

Barret, V

Basrak, Z

Bastid, N

Berek, G

Caplar, R

Devismes, A

Dupieux, P

Dzelalija, M

Finck, C

Fodor, Z

Gobbi, A

Grishkin, Y

Hartmann, ON

Hildenbrand, KD

Hong, B

Kecskemeti, J

Kim, YJ

Kirejczyk, M

Koczon, P

Korolija, M

Kotte, R

Kress, T

Lebedev, A

Leifels, Y

Lopez, X

Merschmeyer, M

Neubert, W

Pelte, D

Petrovici, M

Rami, F

de Schauenburg, B

Schüttauf, A

Seres, Z

Sikora, B

Sim, KS

Simion, V

Siwek-Wilczynska, K

Smolyankin, V

Stockmeier, MR

Stoicea, G

Tyminski, Z

Wagner, P

Wisniewski, K

Wohlfarth, D

Yushmanov, I

机构：

[1] Gesell Schwerionenforsch mbH, D-6100 Darmstadt, Germany

[2] Natl Inst Phys & Nucl Engn, Bucharest, Romania

[3] KFKI Res Inst Particle & Nucl Phys, Bucharest, Romania

[4] IN2P3, CNRS, Phys Corpusculaire Lab, Clermont Ferrand, France

[5] Univ Clermont Ferrand, Clermont Ferrand, France

[6] Forschungszentrum Rossendorf EV, Dresden, Germany

[7] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany

[8] Inst Theoret & Expt Phys, Moscow 117259, Russia

[9] IV Kurchatov Atom Energy Inst, Moscow 123182, Russia

[10] Korea Univ, Seoul 136701, South Korea

[11] Univ Strasbourg, CNRS, IN2P3, Inst Rech Subatom, Strasbourg, France

[12] Warsaw Univ, Inst Expt Phys, Warsaw, Poland

[13] Rudjer Boskovic Inst, Zagreb, Croatia

来源：

PHYSICAL REVIEW C | 2003年 / 67卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.67.034907

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 new experimental data on directed flow in collisions of Au + Au, Xe + CsI, and Ni + Ni at incident energies from 90A to 400A MeV. We study the centrality and system dependence of integral and differential directed flow for particles selected according to charge. All the features of the experimental data are compared with isospin quantum molecular dynamics (IQMD) model calculations in an attempt to extract information about the nuclear matter equation of state (EoS). We show that the combination of rapidity and transverse momentum analysis of directed flow allows to disentangle various parametrizations in the model. At 400A MeV, a soft EoS with momentum dependent interactions is best suited to explain the experimental data in Au + Au and Xe + CsI, but in the case of Ni + Ni the model underpredicts flow for any EoS. At 90A MeV incident beam energy, none of the IQMD parametrizations studied here are able to consistently explain the experimental data.

引用

页数：19

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