New results on J/ψ from the NA50 experiment

The NA50 experiment studies the production of J/γ in Pb+Pb collisions. The anomalous J/ψ suppression in relativistic heavy ion collisions, considered an unambiguous signature for the formation of a quark gluon plasma, is studied in the dimuon channel, using as reference the Drell-Yan muon pairs. Preliminary results from the analysis of the 2000 data, with the target region vacuum, are presented and compared to an update of those obtained from previous data samples.