Model-Independent Bottom Baryon Mass Predictions in the 1/N Expansion

TL;DR

This paper updates model-independent predictions for bottom baryon masses using recent experimental data, confirming the validity of the 1/N_c, 1/m_Q, and SU(3) flavor symmetry expansion approach.

Contribution

It provides refined mass predictions for undiscovered bottom baryons based on a combined expansion method, validated by recent experimental discoveries.

Findings

Confirmed the mass hierarchy of charm baryons

Updated predictions for unmeasured bottom baryons

Validated the model-independent expansion approach

Abstract

Recent discoveries of the Xi_b, Sigma_b and Sigma_b^* baryons at the Tevatron are in good agreement with model-independent mass predictions made a decade ago based on a combined expansion in 1/N_c, 1/m_Q and SU(3) flavor symmetry breaking. Using the new experimental data as input, mass predictions for the undiscovered bottom baryons Xi_b^\prime, Xi_b^*, Omega_b and Omega_b^* 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/N_c, 1/m_Q and SU(3) flavor breaking expansion.