A large-N_c analysis of the chiral baryon-baryon potential cuts the leading-order contact couplings from fifteen to three and fixes F/D=2/3 and C/D=2.
Heavy Baryon Masses in the $1/m_Q$ and $1/N_c$ Expansions
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abstract
The masses of baryons containing a single heavy quark are studied in a combined expansion in $1/m_Q$, $1/N_c$ and $SU(3)$ flavor symmetry breaking. Heavy quark baryon mass splittings are related to mass splittings of the octet and decuplet baryons. The $\Sigma_c^*$, $\Xi_c^\prime$ and $\Omega_c^*$ are predicted to the level of a few MeV. A number of bottom baryon mass splittings are predicted very accurately.
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The Baryon-Baryon Interaction in the Large-$N_c$ Limit
A large-N_c analysis of the chiral baryon-baryon potential cuts the leading-order contact couplings from fifteen to three and fixes F/D=2/3 and C/D=2.