Quark exchange model for charmonium dissociation in hot hadronic matter.

A diagrammatic approach to quark exchange processes in meson-meson scattering is applied to the case of inelastic reactions of the type (QQ\ifmmode\bar\else\textasciimacron\fi{})+(qq\ifmmode\bar\else\textasciimacron\fi{})\ensuremath{\rightarrow}(Qq\ifmmode\bar\else\textasciimacron\fi{})+(qQ\ifmmode\bar\else\textasciimacron\fi{}), 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/\ensuremath{\psi}+\ensuremath{\pi}\ensuremath{\rightarrow}D+D\ifmmode\bar\else\textasciimacron\fi{} is calculated using a potential model, which is fitted to the meson mass spectrum. The temperature dependence of the relaxation time for the J/\ensuremath{\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.

• Publication year

  1994

• Venue

  Physical review. C, Nuclear physics

• Publication date

  1994-11-15

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevC.51.2723arXiv hep-ph/9411302PMID 9970359
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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