J/ψ absorption by nucleons in the meson-exchange model

We reinvestigate the J/Psi dissociation processes induced by the reactions with nucleons, J/Psi + N -> D-(*) + Lambda(c), in the meson- exchange model. Main constraints used in this work are vector- meson dominance and charm vector-current conservation. We show that the cross section for J/Psi + N -> D + Lambda(c) can be larger than that for J/Psi + N -> Lambda(c) when these constraints are imposed. The dependence of the cross sections on the coupling constants is analyzed in detail, and the comparison with the recent quark-interchange model predictions is also made.