J / psi production in relativistic heavy ion collisions from a multiphase transport model
Jan, 2002
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Abstract:
Using A Multi-Phase Transport (AMPT) model, we study J/psi production from interactions between charm and anti-charm quarks in initial parton phase and between D and Dbar mesons in final hadron phase of relativistic heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC). Including also the inverse reactions of J/psi absorption by gluons and light mesons, we find that the net number of J/psi from the parton and hadron phases is smaller than that expected from the superposition of initial nucleon-nucleon collisions, contrary to the J/psi enhancement predicted by the kinetic formation model. The production of J/psi is further suppressed if one includes the color screening effect in the parton phase. We have also studied the dependence of J/psi production on the charm quark mass and the effective charm meson mass.- 24.10.Lx
- 25.75.Dw
- 24.10.Jv
- scattering: heavy ion
- gold
- J/psi(3100): hadroproduction
- quark antiquark: interaction
- quark: charm
- quark: mass
- D anti-D: interaction
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