  The 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.
