One-loop corrections to omega photoproduction near threshold

Details One-loop corrections to omega photoproduction near threshold One-loop corrections to omega photoproduction near threshold

2002-04-15

arxiv.org/abs/nucl-th/0204035v3

Phys.Rev. C66 (2002) 045201

Physics

Nuclear Physics

Nuclear Theory

19 pages, REVTeX, 14 figures, title changed, revised version to appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.66.045201

One-loop corrections to $\omega$ photoproduction near threshold have been investigated by using the approximation that all relevant transition amplitudes are calculated from the tree diagrams of effective Lagrangians. With the parameters constrained by the data of $\gamma N \to \pi N$, $\gamma N \to \rho N$, and $\pi N \to \omega N$ reactions, it is found that the one-loop effects due to the intermediate $\pi N$ and $\rho N$ states can significantly change the differential cross sections and spin observables. The results from this exploratory investigation suggest strongly that the coupled-channel effects should be taken into account in extracting reliable resonance parameters from the data of vector meson photoproduction in the resonance region.

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