2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/222107An overview is given on recent progress in the study of quarkonium spectroscopy at the B-factories. In particular, an updated status report is presented of the long list of "charmonium-like" resonances newly discovered, whose assignment as true charmonium states is in most cases at least controversial. Also, new measurements on the decay properties of bottomonium states above open-B production thresholds are shown.Heavy Quarks and Leptons, Melbourne, 2008High Energy Physics - Experimenttext