The Giessen Model - Vector Meson Production on the Nucleon in a Coupled Channel Approach

In ref. we developed a unitary gauge invariant effective Lagrangian model including the final states γN , πN , 2πN , ηN , KΛ, and KΣ (ref.) for a simultaneous analysis of all avaible experimental data for photonand pion-induced reactions on the nucleon. In ref. this analysis was extended to K induced reactions. In this paper we discuss an extension of this method to vector meson nucleon final states, outline a generalization of the standard partial wave formalism, that is applicable to any meson-/photon-baryon reaction, and show first results for ωN production.