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

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

2000-10-25

arxiv.org/abs/hep-ph/0010282v1

Eur.Phys.J. A11 (2001) 457-465

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages Latex, 8 postscript figures

Scientific paper

10.1007/s100500170057

In high energy nuclear collisions, the conventional Glauber model is commonly used to evaluate the contribution to $J/\psi$ suppression originating from the inelastic interaction with colorless bound nucleons. This requires an effective value for the $J/\psi$-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 $J/\psi$ absorption. We conclude that the related corrections are important to explain the effective value extrapolated from experiment.

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