This report summarizes the study of the reaction $K^{-}p\to {\overline{K}}^0{\pi }^{-}p$ over the range of energies from 1.0 to 1.7 BeV/c. The reaction is shown to be dominated by the $K^{*-}p$ final state from threshold (1.08 BeV/c) to the highest energy available in this experiment. The best values for $K^{*-}$ parameters are shown to be 891 and 46 MeV for the central value and full width of the resonance, respectively. It is shown that the one-pion-exchange contribution dominates the low-momentum-transfer events at the higher energies. On the assumption that $T=\frac{3}{2}$ $K\pi$ interaction is negligible, which is strongly indicated by the data of Galtieri et al., the $T=\frac{1}{2}$ $K\pi$ $S$-wave phase shift is shown to be small and positive and roughly linear with the center-of-mass momentum in the $K\pi$ system. Influence of other unstable meson and baryon states on this reaction is discussed.

• Received 10 January 1964

DOI:https://doi.org/10.1103/PhysRev.135.B484