$J/\psi$ normal and anomalous suppressions in a hadron and string cascade model
Abstract
A mechanism for the effective dissociation of a pair in the colour electric field of strings is introduced into a hadron and string cascade model, i.e. JPCIAE, which is based on the LUND model, simulating ultra-relativistic nucleus - nucleus collisions. This new mechanism together with the known mechanism of nuclear absorption (both baryons and mesons) could reproduce fairly the data of the normal and anomalous suppressions in minimum bias pA, AB (with light projectile), and Pb + Pb collisions at 200 A GeV/c. However the impact parameter (E_T) dependence of the suppression factor, both, in S + U and Pb + Pb reactions at 200 A GeV/c and 158 A GeV/c, respectively, is not well reproduced. We also tested the additional mechanism of the energy degradation of leading particles, with which both, the normal and anomalous suppressions in minimum bias pA, AB, and Pb + Pb collisions and the E_T dependence of the suppression factor are better reproduced.
Keywords
Cite
@article{arxiv.nucl-th/9809020,
title = {$J/\psi$ normal and anomalous suppressions in a hadron and string cascade model},
author = {Sa Ben-Hao and Amand Faessler and Tai An and T. Waindzoch and C. Fuchs and Z. S. Wang and Wang Hui},
journal= {arXiv preprint arXiv:nucl-th/9809020},
year = {2008}
}
Comments
16 pages (RevTex), 6 ps-figures, to be published in J. Phys. G