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Excitation of Color Degrees of Freedom of Nuclear Matter and $J/ψ$ Suppression

Jörg Hüfner·Boris Z. Kopeliovich·Alberto Polleri
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Abstract

In high energy nuclear collisions, the conventional Glauber model is commonly used to evaluate the contribution to $J/ψ$ suppression originating from the inelastic interaction with colorless bound nucleons. This requires an effective value for the $J/ψ$-nucleon absorption cross section which is larger than theoretically expected. On the other hand, multiple nucleon-nucleon collisions mediated by color exchange interactions, excite their color degrees of freedom. We investigate the importance of this effect and find that these excited states provide a larger cross section for $J/ψ$ absorption. We conclude that the related corrections are important to explain the effective value extrapolated from experiment.

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Jörg Hüfner, Boris Z. Kopeliovich, Alberto Polleri. 2000-10-25. Excitation of Color Degrees of Freedom of Nuclear Matter and $J/ψ$ Suppression. https://doi.org/10.1007/s100500170057

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