J/Psi suppression in ultrarelativistic nuclear collisions

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Date

2000

Journal Title

Journal ISSN

Volume Title

Publisher

American Physical Society

Abstract

Using a multiphase transport model, we study the relative importance of J/psi suppression mechanisms due to plasma screening, gluon scattering, and hadron absorption in heavy ion collisions at the Relativistic Heavy Ion Collider. We find that for collisions between heavy nuclei such as Au+Au, both plasma screening and gluon scattering are important. As a result, the effect due to absorption by hadrons becomes relatively minor. The final J/psi survival 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 screening 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.

Description

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Keywords

HEAVY-ION COLLISIONS, QUARK-GLUON PLASMA, LOW-MASS DILEPTONS, J-PSI-SUPPRESSION, HADRONIC MATTER, PARTON DISTRIBUTIONS, SPS ENERGIES, SMALL VALUES, MODEL, CASCADE, Physics

Citation

B. Zhang, Che Ming Ko, Ba Li, Z. W. Lin and BW Sa. Phys.Rev.C 62 054905 2000. "Copyright (2000) by the American Physical Society."