J/psi production in PHENIX

RaphaŽl Granier de Cassagnac

Heavy quarkonia production is expected to be sensitive to the formation of a quark gluon plasma. The PHENIX experiment has measured J/psi production at 200 GeV in AuAu and CuCu collisions, both at mid (|y|<0.35) and forward (1.2<|y|<2.2) rapidities. These preliminary results will be compared to regular nuclear matter expectations derived from PHENIX dAu and pp measurements and to theoretical models including various effects (color screening, recombination,...)