Decisive search for a diquark-antidiquark meson with hidden strangeness.

Diquark-antidiquark states are expected to exist as a natural complement of mesons and baryons. Although they were predicted long ago, and some candidates were found experimentally, none has, as yet, been reliably identied. We suggest that the search for the so-called C(1480)-meson in reactions such as photoproduction N ! N and KN ! should provide a decisive way to settle this issue. Estimates of the cross sections are given using present experimental information on the C-meson and assuming its diquarkantidiquark structure. Sizable cross sections are predicted (of the order of 0.1 b for photoproduction and of the order of 0.1 mb for KN at the maximum with an insigni cant background). Failure to nd this kind of signal would imply that the C-meson is not a diquark-antidiquark state.