Multiple Pion Production in 5.5-GeV/cπ−pInteractions

About 2000 six-prong events and 130 eight-prong events from an exposure in the Brookhaven 80-in. bubble chamber were analyzed. Production of ${\Delta }^{++}\mathrm{}\left(1238\right)\mathrm{}$, ${\Delta }^{-}\mathrm{}\left(1238\right)\mathrm{}$, and ${\omega }^0$ resonances was observed. The distribution of ${\Delta }^{++}$ and ${\omega }^0$ as a function of four-momentum transfer was similar to that of background. Center-of-mass angular distributions of the nucleons and pions were examined. The nucleons were peaked backward and the pions were essentially isotropic with a slight forward peaking in the ${\pi }^{+}$ case.