https://doi.org/10.1140/epja/i2013-13044-5
Regular Article - Theoretical Physics
Coupled-channel dynamics in the reactions πN → πN, ηN, KΛ, KΣ
19873
Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany
29873
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, Nußallee 14-16, D-53115, Bonn, Germany
39873
Department of Physics and Astronomy, University of Georgia, 30602, Athens, Georgia, USA
49873
Institute for Nuclear Studies and Department of Physics, The George Washington University, 20052, Washington, DC, USA
59873
Institute for Advanced Simulation, D-52425, Jülich, Germany
* e-mail: d.roenchen@fz-juelich.de
Received:
20
December
2012
Accepted:
11
March
2013
Published online:
12
April
2013
Elastic πN scattering and the world data of the family of reactions π − p → ηn, K 0 Λ, K 0 Σ 0, K + Σ −, and π + p → K + Σ + are described simultaneously in an analytic, unitary, coupled-channel approach. SU(3) flavor symmetry is used to relate both the t - and the 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. Partial-wave amplitudes are determined and the resonance content is extracted from the analytic continuation, including resonance positions and branching ratios, and possible sources of uncertainties are discussed. The results provide the final-state interactions for the ongoing analysis of photo- and electroproduction data.
© SIF, Springer-Verlag Berlin Heidelberg, 2013