Isotropy of Pion Emission at 6 Bev

Abstract

Observations have been made of the angular distribution of energetic electron pairs in nuclear emulsions which had been exposed to the internal 6.3-Bev proton beam of the Bevatron. The method by which the pairs were found is discussed. The angular distribution of the pairs is reasonably similar to that of the neutral pions originating in proton-nucleus collisions in the emulsion. Examination of the angular distributions in terms of multiple meson production in nucleon-nucleon collisions indicates that for these observations the emission is consistent with isotropy in the center-of-mass system.