Associative photoproduction of charmed particles near threshold

We calculate the cross section and the beam asymmetry for exclusive photoproduction of charmed particles near threshold ($\gamma+p\to \Lambda_c^+ +\bar{D^0}$), in the framework of an effective Lagrangian model. We discuss the sensitivity of these observables to the magnetic moment of the $\Lambda_c$ baryon and of the coupling constant in the $p\Lambda_c D$ vertex. We show that exclusive measurements allow, in principle, to determine the magnetic moments of charmed baryons.