Inelastic final states with one or two leading hadrons are studied in π+p and K+p interactions at 250 GeV/c. In reactions with two leading hadrons, the dependence of the average charge multiplicity of associated pions on their effective mass is essentially consistent with that observed in p̄p and γγ-collisions, but differs from that obtained in e+e--annihilation. The multiplicity and (semi)inclusive characteristics of the π+-induced non-diffractive reactions are compared to predictions of current versions of the FRITIOF fragmentation model. We show that the hard-like sub-processes, essentially responsible for the production of leading hadrons with relatively large transverse momentum as well as for the relatively large multiplicity of associated pions, are not properly treated in the model.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)