2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48920The predictions are presented for the diagonal and transition form factors of light hadrons in the time-like region up to the production threshold of an open charm quantum number. The comparison with existing data on the decays of J/psi and psi(2S) mesons into such hadrons shows that some new resonance structures may be present in the mass range between 2 GeV and the J/psi mass. Searching them may help in a better understanding of the mass spectrum in quark models, and in revealing the details of the three-gluon mechanism of the OZI rule breaking.RevTex, 5 pages, 5 ps figures. Talk presented by A. A. Kozhevnikov at the International Workshop on e^+e^- collisions from phi to J/psi (March 1-5, 1999, Budker Inst. Nucl. Phys., Novosibirsk, Russia)High Energy Physics - PhenomenologyHigh Energy Physics - Experimenttext