The new Σb multiplet, heavy baryon mass predictions, meson–baryon universality and effective supersymmetry in hadron spectrum

The recent measurement by CDF M(Σb)−M(Λb)=192 MeV is in striking agreement with our theoretical prediction M(Σb)−M(Λb)=194 MeV. In addition, the measured splitting M(Σb∗)−M(Σb)=21 MeV agrees well with the predicted splitting of 22 MeV. We point out the connection between these predictions and an effective supersymmetry between mesons and baryons related by replacing a light antiquark by a light diquark. We discuss the theoretical framework behind these predictions and use it to provide additional predictions for the masses of spin-12 and spin-32 baryons containing heavy quarks, as well as for magnetic moments of Λb and Λc.