A hidden local symmetry approach to rho-meson photoproduction
We study the photoproduction of $ \rho$ -mesons in a model of hidden local symmetry. For this purpose, the $ \rho$ -meson is introduced as a hidden-gauge boson in a non-linear sigma model. For charged $ \rho$ -meson photoproduction, the model takes into account the $ \rho$ -meson magnetic moments from the three-point vertex in the kinetic terms. We show that the magnetic interaction of the charged $ \rho$ -meson has a significant effect on the total cross-sections through the $ \rho$ -meson exchange process, which is proportional to the energy of the photon. The t -channel dominance may be used for the study of structures of various unstable particles.