J/psi strong couplings to vector mesons

We present a study of the cross sections J/psi X -> D-(*)(D) over bar ((*)) (X = rho,phi) based on the calculation of the effective tri- and four-linear couplings J/psi X D-(*)(D) over barD((*)) within a constituent quark model. In particular, the method for the calculation of the four-linear couplings is illustrated. The results obtained have been used in a recent analysis of J/psi absorption by the hot hadron gas formed heavy-ion collisions at SPS energies.