SU(3) CHIRAL DYNAMICS WITH COUPLED CHANNELS - ETA AND KAON PHOTOPRODUCTION

摘要

We identify the leading s-wave amplitudes of the SU(3) chiral meson-baryon Lagrangian with an effective coupled-channel potential which is iterated in a Lippmann-Schwinger equation. The strangeness S = -1 resonance Lambda(1405) and the S-11(1535) nucleon resonance emerge as quasibound states of anti-kaonucleon and kaon/Sigma-hyperon. Our approach to meson photoproduction introduces no new parameters, By adjusting a few finite range parameters we are able to simultaneously describe a large amount of low-energy data. These include the cross sections of K- p elastic and inelastic scattering, the cross sections of eta meson and kaon photoproduction from nucleons as well as those of pion induced production of etas and kaons (16 different reaction channels altogether). [References: 35]