Giessen coupled-channel model for pion- and photon-induced reactions

摘要

The reactions (γ/π) → γN, πN, 2πN, ηN, KΛ, KΣ, ωN are simultaneously analysed within a coupled-channel unitary Lagrangian approach (Giessen Model). The resonance contributions to the different transition channels are shown and discussed. The results for ηN and KΛ final states in both pion- and photo-induced reactions are presented in more details in prospect of new experimental data from MAMI and CLAS. The recent progress in the description of the 2πN channel in terms of the πN → ρN, σN, πΔ transitions is presented.