Study of the reactions K+-p -> K0sub(s)π+-p at 30 and 50 GeV/c

The reactions Ksup(+-)p -> Ksub(s)0πsup(+-)p are studied at 30 and 50 GeV/c. Data for these reactions were obtained using the Geneva-Lausanne spectrometer whose main characteristics are: (I) large forward acceptance; (II) high-resolution time-of-flight for recoil proton momentum measurement; (III) high data-taking rate and on-line pattern recognition. The Ksup(*)(1-), Ksup(*)(2+), Ksup(*)(3-) and Ksup(*)(4+) resonance parameters and production cross sections are determined. The Kπ production amplitudes are calculated both as a function of the Kπ mass and of the momentum transfer. Isoscalar natural parity exchange (NPE) is dominant. The NPE amplitudes are decomposed into pomeron-, f-, ω-exchange contributions, and their energqy dependence between 10 and 50 GeV/c is shown to be well-described by a Regge pole model based on the f-dominated pomeron hypothesis. (orig.)