K−pInteractions at 1.15 BeV/c

Abstract

This paper contains the conclusion of the systematic study of $K^{-}p$ interactions in the Lawrence Radiation Laboratory's 15-in. hydrogen bubble chamber at 1.15 BeV/c. In particular, we report on the elastic and charge-exchange scattering, $K^{*}N$ production, and $\Sigma \pi$ reactions. The procedure used in scanning, measuring, and computer analysis is described in detail. The similarity of total as well as differential cross sections for the three $\Sigma \pi$ charge states suggests predominant production from the $T=0\mathrm{}$ state for this channel. The angular distributions for the $\Sigma \pi$ reactions, as well as the elastic and charge-exchange scattering, indicate that partial waves as high as $F_{\frac{5}{2}}$ must be involved. The analysis of the $K^{-}p{\pi }^0$ reactions substantiates the earlier preliminary result of isotopic spin ½ for the $K^{*}$ resonance. The angular distributions and correlations in the $K^{-}p{\pi }^0$ and $K^{-}{\pi }^{+}n$ reactions support the conclusion, derived from the previous study of our ${\overline{K}}^{0}p{\pi }^{-}$ events, that the $K^{*}$ spin is 0 or 1. A summary of cross sections for all the reactions studied in the experiment is given.