Saturation and parton level Cronin effect:: Enhancement versus suppression of gluon production in p-A and A-A collisions -: art. no. 054009

被引：119

作者：

Baier, R ^{[1
]}

Kovner, A

Wiedemann, UA

机构：

[1] Univ Bielefeld, Fak Phys, D-33615 Bielefeld, Germany

[2] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

[3] Univ Plymouth, Dept Math & Stat, Plymouth PL4 8AA, Devon, England

[4] CERN, Div Theory, CH-1211 Geneva 23, Switzerland

来源：

PHYSICAL REVIEW D | 2003年 / 68卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.68.054009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We note that the phenomenon of perturbative saturation leads to transverse momentum broadening in the spectrum of partons produced in hadronic collisions. This broadening has a simple interpretation as the parton level Cronin effect for systems in which saturation is generated by the "tree level" Glauber-Mueller mechanism. For systems where the broadening results form the nonlinear QCD evolution to high energy, the presence or absence of the Cronin effect depends crucially on the quantitative behavior of the gluon distribution functions at transverse momenta k(t) outside the so called scaling window. We discuss the relation of this phenomenon to the recent analysis by Kharzeev, Levin, and McLerran of the momentum and centrality dependence of particle production in nucleus-nucleus collisions at BNL RHIC.

引用

页数：9

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