2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/179205We present flavour-symmetric results for the couplings of quark-antiquark systems to meson-meson channels in the harmonic-oscillator expansion. We tabulate their values for all possible open and closed decay channels of pseudo-scalar, vector and scalar mesons. We compare the predictions of a model that employs these flavour-symmetric couplings, both with the results of a model which uses explicitly flavour-dependent couplings, and with experiment.29 pages, plain LaTeX, rewritten versionHigh Energy Physics - Phenomenologytext