Scanning the quark-gluon plasma with charmonium |
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Authors: | Kopeliovich B Z Polleri A Hüfner J |
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Affiliation: | Max Planck Institut für Kernphysik, Postfach 103980, D-69029 Heidelberg, Germany. |
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Abstract: | We suggest the variation of charmonium production rate with Feynman x(F) in heavy ion collisions as a novel and sensitive probe for the properties of the created matter. Final state interactions with the comoving matter create a minimum at x(F) = 0, which is especially deep and narrow if a quark-gluon plasma is formed. While a strong effect is predicted at SPS, at the RHIC energy it overlaps with the expected peak formed by shadowing effects and needs comparison with pA data. We predict a steep dependence on centrality and suggest that this new probe is complementary to the dependence on transverse energy, and is more sensitive to a scenario of final state interactions. |
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