Analysis of Proton Fragmentation into Twoπ−Mesons

Abstract
We report on the reactions A+pπ+ and A+pπ+π+, where A is either a 13-GeV/c K+ or K meson or a 7-GeV/c π+ meson. We compare the distribution of final-state pions in the proton-fragmentation region with several theoretical predictions concerning limiting behavior and factorization.