Dissociation rates of J/psi's with comoving mesons - thermal vs. nonequilibrium scenario

Details Dissociation rates of J/psi's with comoving mesons - thermal vs. nonequilibrium scenario Dissociation rates of J/psi's with comoving mesons - thermal vs. nonequilibrium scenario

1998-09-17

arxiv.org/abs/hep-ph/9809441v1

J.Phys.G25:2351-2359,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 6 figures

Scientific paper

10.1088/0954-3899/25/12/305

We study J/psi dissociation processes in hadronic environments. The validity of a thermal meson gas ansatz is tested by confronting it with an alternative, nonequilibrium scenario. Heavy ion collisions are simulated in the framework of the microscopic transport model UrQMD, taking into account the production of charmonium states through hard parton-parton interactions and subsequent rescattering with hadrons. The thermal gas and microscopic transport scenarios are shown to be very dissimilar. Estimates of J/psi survival probabilities based on thermal models of comover interactions in heavy ion collisions are therefore not reliable.

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