2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/146147This paper reviews the experimental status of the Heavy Quarkonium Spectroscopy and highlights the measurements that hint at the existence of a new form of quark and gluon aggregation beyond the mesons and the baryons.7 pages, 9 postscript figures, contributed to the Proceedings of Lepton-Photon 2007High Energy Physics - Experimenttext