Thermal versus direct J/ ? production in ultrarelativistic heavy-ion collisions

By L. Grandchamp, R. Rapp. 2001

134 citations recorded by the source corpus.

Abstract The production of J/Ψ mesons in central collisions of heavy nuclei is investigated as a function of collision energy. Two contributions are considered simultaneously: early (hard) production coupled with subsequent suppression in a quark–gluon plasma, as well as thermal recombination of primordially produced c and c quarks at the hadronization transition. Whereas the former still constitutes the major fraction of the observed J/Ψ abundance at SpS energies, the latter dominates the yield at RHIC. The resulting excitation function for the number of J/Ψ's over open charm pairs exhibits nontrivial structure around s ≃30 A GeV, evolving into a significant rise towards maximal RHIC energy. We study this feature within different (thermal) scenarios for J/Ψ suppression, including parton-induced quasifree destruction as a novel mechanism.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d77ded81292bf5b69060721eba4576710c9d4ee4

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In Nuclear and High Energy Physics

1. J. Stachel
2. R. Rapp
3. J. Lansberg
4. Alexander Rothkopf
5. A. Andronic
6. H. Hees
7. H. Satz
8. M. He

Citations in the corpus

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