Another look at anomalous
Pb + Pb collisions at
DAPNIA/SPhN, CEA/Saclay, 91191 Gif-sur-Yvette Cedex,
Received: 7 June 1999 / Revised version: 13 September 1999 /
Published online: 3 February 2000 - © Springer-Verlag 2000
A new data presentation is proposed in order to consider anomalous suppression in Pb + Pb collisions at P/A=158GeV/c. If the inclusive differential cross section with respect to a centrality variable is available, one can plot the yield of 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 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.
Copyright Società Italiana di Fisica, Springer-Verlag 2000