2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97526We analyze charm meson semileptonic $D \to V l ν_l$ and $D\to P l ν_l$ and nonleptonic $D \to P V$, $D \to PP$ and $D \to VV$ decays within a model which combines the heavy quark effective Lagrangian and chiral perturbation theory.14 pages, latex, no figures, Contributed paper for LEPTON - PHOTON INTERACTIONS, Hamburg, Germany, 28 July - 1 August 1997High Energy Physics - Phenomenologytext