ReactionK+p→K0π+pat2.26 BeVc

Abstract

The properties of the $K^{*}\left(895\mathrm{} \mathrm{MeV}\right)$ and $N^{*}\left(1238\mathrm{} \mathrm{MeV}\right)$ resonances produced in the reaction $K^{+}p\to K^0{\pi }^{+}p$ at $2.26 \frac{\mathrm{BeV}}{c}$ are studied. The production of one or the other of these resonances is found to occur in this channel 80% of the time. The decay correlations of the $K^{*}$ and $N^{*}$ indicate that the dominant mechanism involved in their production may be single-vector-meson exchange. In particular, the decay angular distributions of the $N^{*}$ are in good agreement with the predictions of the Stodolsky-Sakurai model. The experimental differential cross sections for production of each of these resonances are also compared with theoretical predictions based on a single-meson-exchange model which includes the effects of absorption due to competing channels. The agreement of the data with the theory is found to be only moderate here.