We calculate the asymmetries for the processes
$\vec\gamma+\vec p\to \Lambda_c^+ (\Sigma_c^+)+
\overline{D^0}$ and $\vec\gamma+\vec p\to
\Lambda_c^+ (\Sigma_c^+)+\overline{D^*}$,
induced by circularly polarized photons on a
polarized proton target in the framework
of an effective Lagrangian model. We found large
and positive values for the asymmetry induced by
the $z-$component of the proton polarization, in
a wide energy region, from threshold up to
$E_\gamma=70$ GeV. In the case of pseudoscalar
meson photoproduction, the predictions are
qualitatively model-independent.
For $D^*$-photoproduction, there is a strong
dependence of the asymmetries
on $N\Lambda_c D(D^*)$-coupling constants. |
