Inelastic π --nucleon interactions at 7.5 GeV in the emulsion

Interactions initiated by 7.5 GeV π ^--mesons of the Dubna synchrophasotron were studied by emulsion technique. The mean free path for inelastic collisions of negative pions of 7.5 GeV energy in emulsion proved to be (38.4 ± 1.0) cm. With appropriate criteria we selected in the emulsion 215 inelastic pion nucleon interactions. Out of the secondary tracks 279 were identified. The angular distribution of the emitted pions, their momenta and transverse momenta were investigated. The discussion of the results shows that the interactions with an inelasticity K > 0.5 may be described by the statistical theory of multiple production.