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(Non)Thermal Aspects of Charmonium Production and a New Look at J/$ψ$ Suppression

P. Braun-Munzinger·J. Stachel
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Abstract

To investigate a recent proposal that J/$ψ$ production in ultra-relativistic nuclear collisions is of thermal origin we have reanalyzed the data from the NA38/50 collaboration within a thermal model including charm. Comparison of the calculated with measured yields demonstrates the non-thermal origin of hidden charm production at SPS energy. However, the ratio $ψ^{'}$/(J/$ψ)$ exhibits, in central nucleus-nucleus collisions, thermal features which lead us to a new interpretation of open charm and charmonium production at SPS energy. Implications for RHIC and LHC energy measurements will be discussed.

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P. Braun-Munzinger, J. Stachel. 2000-08-18. (Non)Thermal Aspects of Charmonium Production and a New Look at J/$ψ$ Suppression. https://doi.org/10.1016/s0370-2693(00)00991-6

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