Seminarium Teorii Oddziaływań Elementarnych

I discuss several highly accurate theoretical predictions formasses of baryons containing the b quark which have been recentlyconfirmed by experimental data from CDF, LHCb and CMS. Proper treatment of the color-magnetic hyperfine interaction in QCD is crucial for obtaining these results. Several predictions are given for additional properties of heavy baryons. I also discuss the two charged exotic resonances Z_b with quantum numbers of a (b bbar u dbar) tetraquark, very recently reported by Belle in the channel Upsilon(nS)pi+, n=1,2,3. Among possibleimplications are deeply bound I=0 counterparts of the Z_b-s andexistence of a (Sigma_b +Sigma_b-) dibaryon, a beauteron.