Another look at anomalous J/Ψ suppression in Pb + Pb collisions at P/A = 158 GeV/c Original Research Article

A new data presentation is proposed to look at anomalous J/Ψ suppression in Pb + Pb collisions at P/A = 158 GeV/c. If inclusive distributions of centrality variable are available, one can plot the yield of J/Ψ events per pb−pb collision as a function of an estimated squared impact parameter. Both quantities are raw experimental data and have a clear physical meaning. As compared to the usual J/Ψ over Drell-Yan ratio, there is a huge gain in statistical accuracy.