Disintegrations Produced in Nuclear Emulsions by 1.5-Bev Negative Pions

Abstract

The stars produced in nuclear emulsions by 1.5-Bev ${\pi }^{-}$ mesons are analyzed. The numbers of stars as a function of the numbers of prongs are obtained and compared with stars produced by protons of similar energies. The angular distributions of prongs from the pion-produced stars are also derived. An example of the decay of a hyperfragment ${\mathrm{He}}^{5*}$ emerging from a pion star is described and the production of $K$ particles by 1.5-Bev pions is noted.