Elastic scattering and single-pion production in K+p reaction at 4.27 GeV/c

Elastic K⁺p scattering at a beam momentum of 4.27 GeV/c is studied and compared with elastic K⁻p scattering in order to extract the imaginary part of the non-Pomeranchukon-exchange amplitude. The single-pion-production cross sections are presented as well as production cross sections and resonance parameters for the Δ(1236), the $K^{*+}\left(890\right)$, and the $K^{*+}\left(1420\right)$. Production and decay distributions for the Δ⁺⁺(1236) and the $K^{*+}\left(890\right)$ are presented and compared with the absorptive particle-exchange model and with Regge-pole-exchange models.