Keywords: 
• 非弹性介子-介子散射 /
• 夸克交换 /
• 夸克-反夸克湮灭和产生

Abstract: We have established a quark-interchange model and have proposed a quark-antiquark annihilation model to study meson-meson scattering.From QCD we obtain a temperature-dependent quark potential.The transition potential corresponding to quark-antiquark annihilation and creation is derived in perturbative QCD.The experimental ground-state meson masses are reproduced and the experimental data of elastic phase shifts for ππ scattering near the threshold energy in vacuum can be accounted for in the Born approximation.Starting from S-matrix element,we derive the transition amplitude and the cross section for the scattering.Unpolarised cross sections for reactions involving π,ρ,K and K* are calculated.Remarkable temperature dependence of the cross sections is found.