Heavy Baryons and Exotics Spectrum

Abstract

We discuss several highly accurate theoretical predictions for masses of baryons containing the b quark which have been recently confirmed by experimental data. Several predictions are given for additional properties of heavy baryons. We also discuss the two charged exotic resonances Z_b with quantum numbers of a (b bbar u ddbar) tetraquark, very recently reported by Belle in the channel [Upsilon(nS) \pi^+, n=1,2,3]. Among possible implications are deeply bound I=0 counterparts of the Z_b-s and existence of a Sigma_b^+ Sigma_b^- dibaryon, a "beauteron".

Comments: Invited talk at Hadron 2011, the XIV International Conference on Hadron Spectroscopy, 13-17 June 2011, Munich, Germany; 8 pages, 1 figure