Reaction $K^{+}p\to K^{+}p{\pi }^{+}{\pi }^{-}$ at $2.26 \frac{\mathrm{BeV}}{c}$

The reaction $K^{+}p\to K^{+}p{\pi }^{+}{\pi }^{-}$ at $2.26 \frac{\mathrm{BeV}}{c}$ is investigated. It is found to be dominated by the simultaneous production of the $K^{*}$ (895 MeV) and $N^{*}$ (1238 MeV) resonances. The production and decay angular distributions of these resonances in the double-resonance channel are analyzed and the results compared with the predictions of a single-particle-exchange model. These distributions are consistent with the assumption that the primary production mechanism responsible for the reaction $K^{+}p\to K^{*0\mathrm{}}{N}^{*++}\to K^{+}{\pi }^{-}{\pi }^{+}p$ at $2.26 \frac{\mathrm{BeV}}{c}$ is the exchange of a single $\pi$ meson. A search is conducted in this channel for other possible resonant states. A Monte Carlo analysis is utilized for this purpose. The data are not found to be consistent with the production of any other resonances except the aforementioned $K^{*}$ (895 MeV) and $N^{*}$ (1238 MeV).