Coupled-channel dynamics in the reactions πN → πN, ηN, KΛ, KΣ

Rönchen, D.; Krewald, S.; Hanhart, C.; Haidenbauer, J.; Döring, M.; Nakayama, K.; Huang, F.; Haberzettl, H.; Meißner, U. -G.

doi:10.1140/epja/i2013-13044-5

Journal Article

FZJ-2013-05208

Coupled-channel dynamics in the reactions πN → πN, ηN, KΛ, KΣ

Rönchen, D. (Corresponding author)FZJ* ; Döring, M.FZJ* ; Huang, F. ; Haberzettl, H. ; Haidenbauer, J.FZJ* ; Hanhart, C.FZJ* ; Krewald, S.FZJ* ; Meißner, U. -.FZJ* ; Nakayama, K.FZJ*

2013
Springer Berlin

The European physical journal / A 49(4), 44 (2013) [10.1140/epja/i2013-13044-5]

This record in other databases:

Please use a persistent id in citations: http://hdl.handle.net/2128/13260 doi:10.1140/epja/i2013-13044-5

Abstract: 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. PDF = http://www.springerlink.com/
Elastic piN scattering and the world data of the family of reactions pi^- p --> eta n, K^0 Lambda$, K^0 Sigma^0, K^+ Sigma^-, and pi^+ p --> K^+ Sigma^+ 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.

Keyword(s): meson baryon: scattering amplitude ; SU(3) ; coupled channel ; final-state interaction ; angular distribution ; electroproduction ; baryon resonance ; branching ratio ; polarization ; partial wave ; unitarity ; pi nucleon: elastic scattering ; pi nucleon: exclusive reaction ; spin: rotation ; pi nucleon --> nucleon eta ; pi nucleon --> Lambda K ; pi nucleon --> Sigma K