Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

2011

Journal or Book Title

Nuclear Physics A

Volume

854

Issue

1

First Page

198

Last Page

203

DOI

10.1016/j.nuclphysa.2010.08.005

Abstract

In spite of the sweeping coherence effects in high energy hadron and nuclei collisions, kT-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 J/Psi production in AA collisions from that in dA. We present the calculation of J/Ψ multiplicity in the framework of the CGC (color glass condensate)/saturation and show that it agrees with the experimental data.

Comments

NOTICE: This is the author's version of a work that was accepted for publication in Nuclear Physics A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Nuclear Physics A, v.854 (2011): doi: 10.1016/j.nuclphysa.2010.08.005.

Copyright Owner

Elsevier

Language

en

File Format

application/pdf

Published Version

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