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arXiv · hep-ph/9411302

Quark exchange model for charmonium dissociation in hot hadronic matter

K. Martins·D. Blaschke·E. Quack
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Abstract

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 $J/ψ+ π\to D+ \bar D$ 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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K. Martins, D. Blaschke, E. Quack. 1994-11-15. Quark exchange model for charmonium dissociation in hot hadronic matter. https://doi.org/10.1103/physrevc.51.2723

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