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Quark exchange model for charmonium dissociation in hot hadronic matter

Journal Article · · Physical Review, C
;  [1];  [2]
  1. Max-Planck-Gesellschaft AG ``Theoretische Vielteilchenphysik,`` Universitaet Rostock, D-18051 Rostock (Germany)
  2. Gesellschaft fuer Schwerionenforschung mbH, Postfach 11 05 52, D-64220 Darmstadt (Germany)
A diagrammatic approach to quark exchange processes in meson-meson scattering is applied to the case of inelastic reactions of the type ({ital Q{bar Q}})+({ital q{bar q}}){r_arrow}({ital Q{bar q}})+({ital q{bar Q}}), where {ital Q} and {ital 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 {ital J}/{psi}+{pi}{r_arrow}{ital D}+{ital {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 {ital 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.
OSTI ID:
44712
Journal Information:
Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 51; ISSN 0556-2813; ISSN PRVCAN
Country of Publication:
United States
Language:
English

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