We review studies of inelastic meson-meson scattering. In nonperturbative schemes with chiral-perturbation-theory Lagrangians and in models based on effective meson Lagrangians, inelastic meson-meson scattering leads to the successful identification of resonances in meson-meson reactions, adequate inclusion of final state interactions in particle decays, and so on. For mesons of which each consists of a quark and an antiquark, inelastic meson-meson scattering may be caused by quark-antiquark annihilation, quark-antiquark creation, quark interchange, and quark-antiquark annihilation and creation. In transition amplitudes for meson-meson scattering mesonic quark-antiquark relative-motion wave functions depend on hadronic matter, and transition potentials are given in perturbative quantum chromodynamics. Via transition amplitudes the cross sections for inelastic meson-meson scattering depend on the temperature of hadronic matter. Some prominent temperature dependence of the cross sections has been found. Inelastic meson-meson scattering becomes even more significant in proton-proton collisions and lead-lead collisions at the Large Hadron Collider.

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强子物质中的非弹性介子-介子散射

我们回顾了非弹性介子-介子散射的研究。在具有手性微扰理论拉格朗日的非微扰方案和基于有效介子拉格朗日的模型中，非弹性介子-介子散射导致成功识别介子-介子反应中的共振，在粒子衰变中充分包含终态相互作用等. 对于由夸克和反夸克组成的介子，非弹性介子-介子散射可能是由夸克-反夸克湮灭、夸克-反夸克生成、夸克交换、夸克-反夸克湮灭和生成引起的。在介子-介子散射中，介子夸克-反夸克相对运动波函数的跃迁幅度取决于强子物质，跃迁势在微扰量子色动力学中给出。通过跃迁幅度，非弹性介子-介子散射的截面取决于强子物质的温度。已经发现横截面的一些显着的温度依赖性。在大型强子对撞机的质子-质子碰撞和铅-铅碰撞中，非弹性介子-介子散射变得更加重要。