SU(3) chiral dynamics with coupled channels: ETA and KAON production

We identify the next-to-leading order s- and p-wave amplitudes of the SU(3) chiral meson-baryon Lagrangian with a coupled-channel potential which is iterated in a separable Lippmann-Schwinger equation. The nucleon resonance S₁₁(1535) emerges as a quasi-bound state of kaon and Σ-hyperon. Our approach to η- and K-meson photoproduction introduces no new parameters. By adjusting some parameters of the next-to-leading order chiral Lagrangian and a few finite range parameters we are able to describe simultaneously a large amount of low energy data. These include the cross sections for pion- and photon-induced production of η- and K-meson from nucleons.