K+ MOMENTUM SPECTRUM FROM (K-, K+) REACTIONS IN THE INTRANUCLEAR CASCADE MODEL

摘要

In the framework of intranuclear cascade (INC) type calculations, we study the momentum spectrum in the reactions (K-,K+) at a beam momentum of 1.65 GeV/c. The INC model calculations are compared with the relativistic impulse approximation (RTA) calculations to perform a detailed study of the reaction mechanism. We find that the INC model can reproduce the experimental data on various targets. Especially, in the low-momentum region, the forward-angle cross sections of the (K-, K+) reaction from light to heavy targets are consistently explained with the two-step strangeness exchange and production processes with various intermediate mesons, and phi, a(0) and f(0) productions and their decay into K+K-. In the two-step processes, inclusion of meson and hyperon resonances is found to be essential. [References: 68]