Quarkonia Production in Hot and Cold Matters

Abstract

Quarkonia were predicted to be suppressed in the "hot" deconfined matter known as the Quark Gluon Plasma (QGP), but they were also seen to suffer from "cold" nuclear matter effects (parton shadowing, nuclear absorption...). Both at SPS and RHIC, suppression beyond nuclear effects was observed, but the rapidity dependence of the RHIC result is not easy to interpret. I review here the current status of these results, their possible interpretations and the new measurements that could provide insights on quarkonia suppression. Some of them were presented at this conference.

8 pages, 4x2 figures, to appear in the proceedings of Quark Matter 2008: 20th International Conference on Ultra-Relativistic Nucleus Nucleus Collisions (QM 2008), Jaipur, India, 4-10 Feb 2008. Version 3 accepted by editor. Figure 3 corrected

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• Perspectives on heavy-quarkonium production at the LHC
• Color Deconfinement and Charmonium Production in Nuclear Collisions
• Charmonium from Statistical Hadronization of Heavy Quarks -- a Probe for Deconfinement in the Quark-Gluon Plasma
• Static meson correlators in 2+1 flavor QCD at non-zero temperature
• J/Psi suppression, percolation model and the critical energy density in AA collisions at SPS and RHIC energies with the account of centrality