Study of K−p→K¯Nπ Reactions at 1.33 GeVc

The reactions ${K}^{\ensuremath{-}}p\ensuremath{\rightarrow}\overline{K}N\ensuremath{\pi}$ at 1.33 $\frac{\mathrm{GeV}}{c}$ are found to be dominated by ${\overline{K}}^{*}(890)N$ production. Some evidence is also found for ${N}^{*}(1236)\overline{K}$ and $Y_{0}^{*}(1520)\ensuremath{\pi}$ production. Slight amounts of $Y_{1}^{*}(1765)\ensuremath{\pi}$ are seen. An investigation of the angular distributions of events in the ${\overline{K}}^{*}(890)$ mass region was made. A backward peaking exists in the production angular distribution of ${\overline{K}}^{*\ensuremath{-}}p\ensuremath{\rightarrow}{\overline{K}}^{0}{\ensuremath{\pi}}^{\ensuremath{-}}p$. No evidence for this backward peaking is found in the other ${\overline{K}}^{*}N$ final states. Both production and the decay angular distributions of the ${\overline{K}}^{*}(890)$ indicate that the ${\overline{K}}^{*0}n$ final state can be explained by an exchange of a pseudoscalar meson of small mass. In the ${\overline{K}}^{*\ensuremath{-}}p$ final states, the exchange of an isotopic spin-zero vector meson as well as a pseudoscalar meson explain the data.