The cross sections for $K^{+}p$ interactions at a center-of-mass energy of 3 GeV (4.3 GeV/c incident momentum) have been determined for the $K^{+}p{\pi }^{+}{\pi }^{-}$, $K^{0}p{\pi }^{+}{\pi }^0$, and $K^0{\pi }^{+}{\pi }^{+}n$ final states. The shape of the differential cross section $\frac{d\sigma }{d{t}^{\prime }}$ for the quasi-two-body final state $K^{*0\mathrm{}}\mathrm{}\left(890\right)+{\Delta }^{++}\mathrm{}\left(1236\right)\mathrm{}$ is not a single exponential. Characteristics of the low-mass $K\pi \pi$ and $p\pi \pi$ enhancements are discussed.

• Received 23 February 1981

DOI:https://doi.org/10.1103/PhysRevD.26.2973