Kaon-Nucleon systems and their interactions in the Skyrme model

We study kaon-nucleon systems in the Skyrme model in a method based on the bound state approach of Callan-Klebanov but with the kaon around the physical nucleon of the rotating hedgehog. This corresponds to the variation after projection, reversing the order of semiclassical quantization of 1/N-c expansion. The method, however, is considered to be suited to the study of weakly interacting kaon-nucleon systems including loosely (K) over barN bound states such as Lambda(1405). We have found a bound state with binding energy of order 10 MeV, consistent with the observed state. We also discuss the (K) over barN interaction and find that it consists of an attraction in the middle range and a repulsion in the short range.