The observation of an anomalous J/psi suppression in nucleus-nucleus collisions is one of the most important results of the Super Proton Synchrotron (SPS) heavy-ion program. An essential ingredient in this result is the determination, obtained by studying p-A collisions, of effects not related with the formation of a deconfined medium. These effects are extrapolated to A-Acollisions, determining a reference J/psi yield that is then compared with the measurements. In this article we investigate the role of parton shadowing on the determination of such a reference, and we calculate its effect for In-In and Pb-Pb collisions as a function of rapidity and centrality.
Role of parton shadowing in the comparison of p-A and A-A results on J/psi suppression at energies available at the CERN Super Proton Synchrotron
CORTESE, Pietro;
2010-01-01
Abstract
The observation of an anomalous J/psi suppression in nucleus-nucleus collisions is one of the most important results of the Super Proton Synchrotron (SPS) heavy-ion program. An essential ingredient in this result is the determination, obtained by studying p-A collisions, of effects not related with the formation of a deconfined medium. These effects are extrapolated to A-Acollisions, determining a reference J/psi yield that is then compared with the measurements. In this article we investigate the role of parton shadowing on the determination of such a reference, and we calculate its effect for In-In and Pb-Pb collisions as a function of rapidity and centrality.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
