Strange-Particle Production in 2.7-GeV/cπ−pInteractions

A total of 1514 strange-particle events have been analyzed in a sample of 30 000 pictures of incident 2.7-GeV/c ${\pi }^{-}$ in the 72-in. hydrogen bubble chamber. Strong resonance production is observed, particularly $K^{*}\mathrm{}\left(888\right)\mathrm{}$, $Y_1^{}{}_{}{}^{*}\mathrm{}\left(1385\right)\mathrm{}$, and $Y_0^{}{}_{}{}^{*}\left(1405\mathrm{} \mathrm{and} 1520\right)$. In general, baryon systems are peaked sharply backward in the center-of-mass system, consistent with peripheral production. Partial cross sections and a study of all final states are presented. The total strange-particle cross section at this energy is calculated to be 1.49±0.07 mb.