Study of collective flow effects in CC collisions at a momentum of 4.2 GeV/c per nucleon

被引：7

作者：

Chkhaidze, LV ^{[1
]}

Djobava, TD

Kharkhelauri, LL

Kladnitskaya, EN

Kuznetsov, AA

机构：

[1] Tbilisi State Univ, Inst High Energy Phys, Tbilisi, Georgia

[2] Joint Inst Nucl Res, Dubna 141980, Moscow Oblast, Russia

来源：

PHYSICS OF ATOMIC NUCLEI | 2004年 / 67卷 / 04期

关键词：

D O I：

10.1134/1.1707129

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：

Directed (in-plane) flows of protons, pions, and projectile light fragments (d, t, He-3, He-4) have been observed by investigating the dependence of the mean transverse momentum in the reaction plane (p(x)) on the rapidity y in the c.m. system for CC collisions at a momentum of 4.2 GeV/c per nucleon. The comparison of our in-plane-flow results of protons with flow data for various projectile/target configurations was made using the scaled flow F-s = F/(A(p)(1/3) + A(T)(1/3)). F-s demonstrates a common scaling behavior for flow values from different systems. From azimuthal distributions of protons and pi(-) mesons, out-of-plane (squeeze-out) flow effects have been observed and the parameter a(2) (the measure of the anisotropic emission strength) has been extracted. The quark-gluon string model reproduces the experimental results quite well. (C) 2004 MAIK "Nauka/Interperiodica".

引用

页码：693 / 702

页数：10

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