Suppression of Psi' and J/Psi in High-Energy Heavy-Ion Collisions
Cheuk-Yin Wong
Abstract
The experimental ratio of ψ' to J/ψ is approximately a constant in pA collisions, but decreases as the transverse energy increases in nucleus-nucleus collisions. These peculiar features can be explained as arising from approximately the same c c-baryon absorption cross section for ψ' and J/ψ but greater disruption probabilities for ψ' than for J/ψ due to the interaction of the c c system with soft particles produced in baryon-baryon collisions.
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