QUARK EXCHANGE MODEL FOR CHARMONIUM DISSOCIATION IN HOT HADRONIC MATTER

被引：128

作者：

MARTINS, K ^{[1
]}

BLASCHKE, D ^{[1
]}

QUACK, E ^{[1
]}

机构：

[1] GESELL SCHWERIONENFORSCH MBH, D-64220 DARMSTADT, GERMANY

来源：

PHYSICAL REVIEW C | 1995年 / 51卷 / 05期

关键词：

D O I：

10.1103/PhysRevC.51.2723

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

A diagrammatic approach to quark exchange processes in meson-meson scattering is applied to the case of inelastic reactions of the type (QQ̄)+(qq̄)→(Qq̄)+(qQ̄), 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→D+D̄ is calculated using a potential model, which is fitted to the meson mass spectrum. The temperature dependence of the relaxation time for the J/ψ 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. © 1995 The American Physical Society.

引用

页码：2723 / 2738

页数：16

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