J/$ψ$ production measurements by the PHENIX experiment at RHIC

Details J/$ψ$ production measurements by the PHENIX experiment at RHIC J/$ψ$ production measurements by the PHENIX experiment at RHIC

2008-05-29

arxiv.org/abs/0805.4562v1

Eur.Phys.J.C61:683-686,2009

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 4 figures, to appear in the proceedings of the 43rd Rencontres de Moriond, March 2008, La Thuile, Italy

Scientific paper

10.1140/epjc/s10052-009-0900-y

Measurements of J/$\psi$ production by the PHENIX experiment in p+p, d+Au, Cu+Cu and Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV are reviewed. The results show a suppression beyond what can be explained by cold nuclear matter effects in the most central Au+Au and to a lesser extent in Cu+Cu collisions. In addition, the suppression observed at mid rapidity in Au+Au is smaller than at forward rapidity, a tendency opposite to what is expected from the higher energy density at mid rapidity. Regeneration, a possible explanation, can be tested by measuring the elliptic flow parameter v$_2$ of J/$\psi$.

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