Scattering ofK+Mesons by Nucleons

A calculation of the scattering of low-energy (≲50 Mev) $K^{+}$ mesons by nucleons via the mechanism of a boson-boson interaction between two pions and two $K$ mesons is presented. The following experimentally observed features of the low-energy scattering seem to be simply represented by the scheme: (a) The scattering is predominantly in the $S$ wave and the cross section shows a slight rise with increasing energy. (b) The effective nuclear potential is repulsive and of relatively short range (∼½μ). (c) The charge exchange scattering is very small at very low energies. A preliminary discussion of the scattering at higher energies is given by introducing, in addition, the "direct" scattering via the interactions of $K$ mesons with nucleons and hyperons.