期刊
NUCLEAR PHYSICS A
卷 854, 期 1, 页码 198-203出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysa.2010.08.005
关键词
J/psi; Color glass condensate; Gluon saturation
资金
- U.S. Department of Energy [DE-FG02-87ER40371, DE-AC02-98CH10886]
In spite of the sweeping coherence effects in high energy hadron and nuclei collisions, k(T)-factorization can be recovered for the inclusive gluon production in pA collisions at the leading logarithmic order. In open charm production at RHIC kT-factorization holds numerically with about 10-20% accuracy. This allows to extrapolate the cold nuclear matter effect observed in light and charm meson production in dA collisions to that in AA ones. Unlike the open charm, the breakdown of factorization in J/psi production is severe. Indeed, already at the lowest order in gluon density the main contribution to the inclusive cross section is proportional to the square of gluon density in the nucleus. As a consequence, one cannot infer the cold nuclear matter effect on production in AA collisions from that in dA. We present the calculation of J/psi multiplicity in the framework of the CGC (color glass condensate)/saturation and show that it agrees with the experimental data. (C) 2010 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据