2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185838An effective hadronic Lagrangian including the charm mesons is introduced to study their interactions in hadronic matter. Using coupling constants that are determined either empirically or by the SU(4) symmetry, we have evaluated the absorption cross sections of $J/ψ$ and the scattering cross sections of $D$ and $D^*$ by $π$ and $ρ$ mesons.5 pages, 4 eps figures, presented at Strangeness 2000, Berkeley. Uses iopart.clsNuclear Theorytext