pi and rho loop corrections to omega photoproduction in the resonance region

Abstract

One-loop corrections due to the intermediate $\pi N$ and $\rho N$ states are studied in $\omega$ photoproduction near threshold. Our results show that the coupled-channel effects should be taken into account in extracting reliable nucleon resonance parameters from the forthcoming vector meson photoproduction data in the resonance region.

4 pages, to be published in the proceedings of XVI International Conference on Particles and Nuclei (PANIC'02), Osaka, Japan, Sep. 30 - Oct. 4, 2002