Abstract
Within the framework of a simple model including chromomagnetic interactions only, the energies of diquonia ${Q}^{2}({\overline{Q}}^{2})$ with orbital angular momentum $L=0$ are calculated and compared to the threshold energies. The results are given as functions of mass ratios and all possible diquonia built with $u$, $d$, $s$, $c$, $b$ quarks and spins $S=0,1,2$ are studied. A number of new systems which could be bound under strong interactions are proposed.
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