Authors Referees APS Members |
January 2008, to be published in Physical Review D1
Model-independent bottom baryon mass predictions in the $1/N_c$ expansion
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. © 2008 The American Physical Society.
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