Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2002-07-03
Physics
High Energy Physics
High Energy Physics - Experiment
4 pages, 5 figures. Contribution at XXXVIIth Rencontres de Moriond "QCD and Hadronic interactions" session. To be published in
Scientific paper
To understand the reliability of the charmonia suppression as a signature of the Quark-Gluon Plasma formation in nucleus-nucleus collisions it is important first to understand the details of the production of J/psi and psi' in pA interactions and the difference in the suppression of these two states. This report presents the results of the study by the NA50 collaboration of the J/psi and psi' production in pA interactions at 450 GeV beam energy and its dependence on rapidity. It is shown that the psi' suffers more suppression than the J/psi, which is consistent with a similar observation made at 800 GeV beam energy by the E866/NuSea collaboration.
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