The reaction π+ p → K+ Σ+ in a unitary coupled-channels model

Elastic pi N scattering and the reaction pi(+) p --> K+Sigma(+) are described simultaneously in a unitary coupled-channels approach which respects analyticity. SU(3) flavor symmetry is used to relate the t- and u-channel exchanges that drive the meson-baryon interaction in the different channels. Angular distributions, polarizations, and spin-rotation parameters are compared with available experimental data. The pole structure of the amplitudes is extracted from the analytic continuation. (C) 2010 Elsevier B.V. All rights reserved.