arXiv:hep-ph/9912213·v1·High Energy Physics — Phenomenology
Coherence Time Effects on J/psi Production and Suppression in Relativistic Heavy Ion Collisions
Charles Gale (1) · Sangyong Jeon (2) · Joseph Kapusta (3) ((1) McGill University · (2) Lawrence Berkeley National Lab. · (3) University of Minnesota)
Abstract
Using a coherence time extracted from high precision proton-nucleus Drell-Yan measurements and a nuclear absorption cross section extracted from pA charmonium production experiments, we study J/psi production and absorption in nucleus-nucleus collisions. We find that coherence time effects are large enough to affect the measured J/psi-to-Drell-Yan ratio. The S+U data at 200A GeV/c measured by NA38 are reproduced quantitatively without the introduction of any new parameters. However, when compared with recent NA50 measurements for Pb+Pb at 158A GeV/c, the data is not reproduced in trend or in magnitude.
Comments: 8 pages, 2 figures