Quark exchange model for charmonium dissociation in hot hadronic matter

Details Quark exchange model for charmonium dissociation in hot hadronic matter Quark exchange model for charmonium dissociation in hot hadronic matter

1994-11-15

arxiv.org/abs/hep-ph/9411302v1

Phys.Rev.C51:2723-2738,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 3 tables, 7 figures

Scientific paper

10.1103/PhysRevC.51.2723

A diagrammatic approach to quark exchange processes in meson-meson scattering is applied to the case of inelastic reactions of the type $(Q\barQ)+(q\barq)\rightarrow (Q\barq) + (q\barQ)$, where $Q$ and $q$ refer to heavy and light quarks, respectively. This string-flip process is discussed as a microscopic mechanism for charmonium dissociation (absorption) in hadronic matter. The cross section for the reaction $J/\psi + \pi \to D+ \bar D$ is calculated using a potential model, which is fitted to the meson mass spectrum. The temperature dependence of the relaxation time for the $\J/Psi$ distribution in a homogeneous thermal pion gas is obtained. The use of charmonium for the diagnostics of the state of hot hadronic matter produced in ultrarelativistic nucleus-nucleus collisions is discussed.

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