Charmonium Suppression with cc~ Dissociation by Strings

Abstract

We study the production of cc~ pairs in nuclear reactions at SPS energies within the covariant transport approach HSD. The production of cc~ is treated perturbatively employing experimental cross sections while the interactions of cc~ pairs with baryons are included by conventional cascade-type two-body collisions. Adopting 6 mb for the cc~-baryon cross sections the data on J/Ψsuppression in p+A reactions are reproduced in line with calculations based on the Glauber model. Additionally the dissociation of the cc~ pairs by strings is included in a purely geometrical way. We find good agreement with experimental data from the NA38 and NA50 collaboration with an estimate for the string radius of ~0.2-0.3 fm.

9 pages (LaTeX), 5 PS figures

References in corpus (2)

• Production and absorption of $c\bar{c}$ pairs in nuclear collisions at SPS energies
• J/ψ-dissociation by a color electric flux tube

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