Dynamical coupled-channel approach to omega meson production with pions and photons

A dynamical coupled-channel formalism is employed in the study of pion and photon induced omega meson production. We consider center-of-mass energies in the region from threshold to 2 GeV. Extensive optimization on parallel processors has been used to determine the parameters of the model hadronic Lagrangian. Non-resonant and resonance parameters are extracted from a least-squares global fit to the available observed differential cross section for $\pi N\to\omega N$ and $\gamma N\to\omega N$. The extracted strong and electromagnetic couplings are then used to calculate the electroproduction data. The importance of coupled-channel and off-shell effects is emphasized in comparisons to approximate $K$ matrix and other models.