S- andP-Wave Interactions ofK−Mesons in Hydrogen

The experimental study of low-energy $K^{-}$-meson interactions in a hydrogen bubble chamber is continued and the energy range extended to a region that involves $P$ waves. Scattering and hyperon-production cross sections are measured at mean $K^{-}$-meson laboratory momenta of 300 Mev/c and 400 Mev/c. Elasticscattering angular distributions are obtained and, along with the values of the cross sections, indicate the presence of $P$ waves.