Cross sections for inelastic 2-to-2 meson-meson scattering in hadronic matter * * National Natural Science Foundation of China (11175111)

Abstract

With quark-antiquark annihilation and creation in the first Born approximation, we study the reactions: , , , , , , , , , , , and . Unpolarized cross sections for the reactions are obtained from transition amplitudes that are composed of mesonic quark-antiquark relative-motion wave functions and the transition potential for quark-antiquark annihilation and creation. Using a quark-antiquark potential that is equivalent to the transition potential, we prove that the total spin of the two final mesons may not be equal to the total spin of the two initial mesons. Based on flavor matrix elements, cross sections for some isospin channels of reactions can be obtained from other isospin channels of the reactions. Remarkable temperature dependence of the cross sections was observed.