Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprk13012z&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
J/ψ production due to the presence of multiple charm-anti-charm pairs in relativistic nuclear collisions is studied within the framework of A Multi-Phase Transport (AMPT) model. The direct production of J/ψ particles from charm-anti-charm quark collisions and from D and barD meson collisions is shown to depend sensitively on the dynamics of the hot and dense system produced in relativistic nuclear collisions. The presence of color screening dissociation of J/ψ particles leads to a large decrease of the production of J/ψ from final state interactions. Final hadronic interactions may lead to an extra production of J/ψ over those produced during the partonic stage. We demonstrate that J/ψ production in the hadronic phase depends sensitively on the effective mass of the charm mesons. The number of J/ψ's produced from final state interactions per binary collision in Au+Au collisions is smaller than that in corresponding pp collisions.
Ko Che Ming
Li Bao-An
Lin Zi-wei
Pal Subrata
Zhang Bin
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