Another look at anomalous J/Psi suppression in Pb+Pb collisions at P/A = 158 GeV/c

Details Another look at anomalous J/Psi suppression in Pb+Pb collisions at P/A = 158 GeV/c Another look at anomalous J/Psi suppression in Pb+Pb collisions at P/A = 158 GeV/c

1999-06-03

arxiv.org/abs/nucl-ex/9906002v2

Eur.Phys.J.C13:63-68,2000

Physics

Nuclear Physics

Nuclear Experiment

6 pages, 5 figures, submitted to The European Physical Journal C; minor revisions for final version

Scientific paper

A new data presentation is proposed to consider anomalous $J/\Psi$ suppression in Pb + Pb collisions at $P/A=158$ GeV/c. If the inclusive differential cross section with respect to a centrality variable is available, one can plot the yield of J/Psi 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/Psi over Drell-Yan ratio, there is a huge gain in statistical accuracy. This presentation could be applied advantageously to many processes in the field of nucleus-nucleus collisions at various energies.

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