RAPIDITY DISTRIBUTION IN 2-CHAIN MODEL OF SOFT HADRONIC-INTERACTIONS

The data on proton-nucleus interactions measured in 1982 at the CERN S PS were parametrized within the multichain model. Since that time very accurate new measurements have been made by the EHS-NA22 Collaboratio n, which require a more accurate new description of multiparticle prod uction processes. In this paper we do this parametrization for the rap idity distributions of meson (pi+ and K+) and proton interactions with protons at the laboratory momentum of 250 GeV/c. We examine the self- consistency of the two-chain model of soft hadronic interactions and e xtrapolate it to the hadron-nucleus and nucleus-nucleus collisions. Th e comparison of the model predictions with the data is presented and s atisfactory agreement between the data and our parametrization at squa re-root s approximately 20 GeV is achieved.