Model-Independent Bottom Baryon Mass Predictions in the 1/N Expansion
Abstract
Recent discoveries of the Xib, Sigmab and Sigmab* baryons at the Tevatron are in good agreement with model-independent mass predictions made a decade ago based on a combined expansion in 1/Nc, 1/mQ and SU(3) flavor symmetry breaking. Using the new experimental data as input, mass predictions for the undiscovered bottom baryons Xib, Xib*, Omegab and Omegab* and for many unmeasured bottom baryon mass splittings are updated. The observed ground state charm baryons exhibit the mass hierarchy previously predicted by the 1/Nc, 1/mQ and SU(3) flavor breaking expansion.
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