Dibaryons from hadron supersymmetry and a diquark model

We use the ideas of hadron supersymmetry and diquarks to obtain predictions concerning the masses of certain dibaryons from the known masses of mesons and baryons without using any free parameters. We find that the $H$ dibaryon, consisting of $uuddss$ quarks, is unbound against strong decay. Likewise, we find that the $Hc$ dibaryon, in which one $s$ quark of the $H$ is replaced by a $c$ quark, is unstable against strong decay. However, in our model the $Hb$ dibaryon may be stable against strong decay.