Hadron production in nuclear collisions at RHIC and high-density QCD

被引：663

作者：

Kharzeev, D ^{[1
]}

Nardi, M

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[2] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy

[3] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

来源：

PHYSICS LETTERS B | 2001年 / 507卷 / 1-4期

关键词：

D O I：

10.1016/S0370-2693(01)00457-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the first results on charged particle multiplicity at RHIC in the conventional eikonal approach and in the framework of high-density QCD. We extract the fraction F of the hadron multiplicity originating from "hard" (i.e., proportional to the number of binary collisions) processes: we find a strong growth of this fraction with energy: F(roots = 56 GeV) similar or equal to 22%, while F(roots = 130 GeV) similar or equal to 37%. This indicates a rapid increase in the density of the produced particles. We outline the predictions of high-density QCD for the centrality, energy, and atomic number dependence of hadron production. Surprisingly, the predictions of the conventional eikonal approach and of high-density QCD for centrality dependence of hadron multiplicity at roots = 130 GeV appear very similar. (C) 2001 Published by Elsevier Science B.V.

引用

页码：121 / 128

页数：8

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