Nuclear absorption of Charmoniums in pA and AA collisions
Abstract
We have analysed the latest NA50 data on production in pA and AA collisions. The production is assumed to be a two step process, (i) formation of pairs, perturbatively calculable, and (ii) formation of from the pair, a non-perturbative process, which is conviniently parametrized. In a nuclear medium, as the pair passes through the nuclear medium, it gain relative square momentum and some of the pairs can gain enough square momentum to cross the threshold for open charm meson, leading to suppression in nuclear medium. Few parameters of the model were fixed from the latest high statistics NA50 pA and NA38 SU total cross sectional data. The model then reproduces the centrality dependence of over Drell-Yan ration in 200 GeV/c S+U and 158 GeV/c Pb+Pb collisions. We also discuss the centrality dependence of suppression at RHIC energy.
Keywords
Cite
@article{arxiv.nucl-th/0302044,
title = {Nuclear absorption of Charmoniums in pA and AA collisions},
author = {A. K. Chaudhuri},
journal= {arXiv preprint arXiv:nucl-th/0302044},
year = {2009}
}
Comments
4 pages including 3 figures, Revised version, to be published in Phys.Rev.C