  We have investigated exclusive photoproduction of light vector mesons
($\omega$, $\rho$ and $\phi$) on the nucleon at low energies. In order to
explore the questions concerning the so-called missing nucleon resonances, we
first establish the predictions from a model based on the Pomeron and meson
exchange mechanisms. We have also explored the contributions due to the
mechanisms involving $s$- and $u$-channel intermediate nucleon state. Some
discrepancies found at the energies near threshold and large scattering angles
suggest a possibility of using this reaction to identify the nucleon
resonances.

Nuclear Theory;High Energy Physics - Experiment;High Energy Physics - Phenomenology