Evaluation of the form factors for ordinary hadrons at the J/psi-meson mass

By using the results of a recent analysis of various channels of e(+)e(-) a nnihilations, diagonal and transition electromagnetic form factors for ligh t hadrons have been calculated in the timelike region up to the threshold o f open-charm production. By comparing the results of these calculations wit h available experimental data on J/psi decays into such hadrons, it has bee n shown that new resonance structures may be present in the mass region abo ve 2 GeV. Their searches can contribute to obtaining deeper insight into th e mass spectrum both in the simple quark model and in more complicated ones and to clarifying fine details of the three-gluon mechanism of violation o f the Okubo-Zweig-Iizuki rule.