Models initial-state energy loss, nuclear shadowing, and final-state absorption on J/ψ and ψ(2S) production in p+A collisions, compares to SPS/Fermilab/HERA-B data, and extrapolates absorption levels for NA60+ and CBM.
A Quantitative Analysis of Charmonium Suppression in Nuclear Collisions
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abstract
Data from J/psi and psi' production in p-A collisions are used to determine the cross section for absorption of pre-resonance charmonium in nuclear matter. The J/psi suppression in O-Cu, O-U and S-U collisions is fully reproduced by the corresponding nuclear absorption, while Pb-Pb collisions show an additional suppression increasing with centrality. We study the onset of this change in terms of hadronic comover interactions and conclude that so far no conventional hadronic description can consistently account for all data. Deconfinement, starting at a critical point determined by central S-U collisions, is in accord with the observed suppression pattern.
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Charmonium suppression in fixed target proton-nucleus collisions
Models initial-state energy loss, nuclear shadowing, and final-state absorption on J/ψ and ψ(2S) production in p+A collisions, compares to SPS/Fermilab/HERA-B data, and extrapolates absorption levels for NA60+ and CBM.