Proton fragmentation into pions and pion systems inK−p interactions at 110 GeV/c and comparison to model predictions

Thex dependence of single pion and multi pion production is studied in the proton fragmentation region ofK−p interactions at 110 GeV/c. A recombination and a string fragmentation model have been tuned to describe the single particle distributions well and are then used to describe two and three pion production when one particle or particle system is selected in a given interval of longitudinal momentum. The string fragmentation model reproduces most of the observed distributions correctly, but fails in the case of multi π+ production.