J/Psi suppression in ultrarelativistic nuclear collisions - art. no. 054905

Using a multiphase transport model, we study the relative importance of J/p si suppression mechanisms due to plasma screening, gluon scattering, and ha dron absorption in heavy ion collisions at the Relativistic Heavy Ion Colli der. We find that for collisions between heavy nuclei such as Au+Au, both p lasma screening and gluon scattering are important. As a result, the effect due to absorption by hadrons becomes relatively minor. The final J/psi sur vival probability in these collisions is only a few percent. In the case of collisions between light nuclei such as S+S, the effect of plasma screenin g is, however, negligible in spite of the initial high parton density. The final J/psi survival probability thus remains appreciable after comparable absorption effects due to gluons and hadrons.