Nucleon resonances in $\omega$ photoproduction

The role of the nucleon resonances ${(N}^{*})$ in $\omega$ photoproduction is investigated by using the resonance parameters predicted by Capstick and Roberts [Phys. Rev. D 46, 2864 (1992); 49, 4570 (1994)]. In contrast with the previous investigations based on the $\mathrm{SU}\mathrm{}\left(6\right)\mathrm{}\times \mathrm{O}\mathrm{}\left(3\right)\mathrm{}$ limit of the constituent quark model, the employed $N^{*}\to \gamma N$ and $N^{*}\to \omega N$ amplitudes include the configuration mixing effects due to the residual quark-quark interactions. The contributions from the nucleon resonances are found to be significant relative to the nonresonant amplitudes in changing the differential cross sections at large scattering angles and various spin observables. In particular, we suggest that a crucial test of our predictions can be made by measuring the parity asymmetry and beam-target double asymmetry at forward scattering angles. The dominant contributions are found to be from $N{\frac{3}{2}}^{+}\mathrm{}\left(1910\right),$ a missing resonance, and $N{\frac{3}{2}}^{-}\mathrm{}\left(1960\right)\mathrm{}$ which is identified as the $D_{13}\mathrm{}\left(2080\right)\mathrm{}$ of the Particle Data Group.