2023 Impact factor 4.2
Particles and Fields
Eur. Phys. J. C 13, 63-68
DOI 10.1007/s100520000261

Another look at anomalous $J/\Psi$ suppression
in Pb + Pb collisions at $P/A = 158\,{\mathrm {GeV}}/c$

J. Gosset - A. Baldisseri - H. Borel - F. Staley - Y. Terrien

DAPNIA/SPhN, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France

Received: 7 June 1999 / Revised version: 13 September 1999 /
Published online: 3 February 2000 - © Springer-Verlag 2000

Abstract
A new data presentation is proposed in order to consider anomalous $J/\Psi$ 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 $J/\Psi$ 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.


Copyright Società Italiana di Fisica, Springer-Verlag 2000