Abstract

We present a phenomenological analysis of the strong couplings of the negative-parity $L=1$ baryons from the perspective of the large-${N}_{c}$ expansion. In the large-${N}_{c}$ limit the mass spectrum and mixing pattern of these states are constrained in a very specific way. The mixing angles are completely determined in this limit, with predictions in good agreement with experiment. In the combined large-${N}_{c}$ and SU(3) limits the pion couplings of the five negative-parity octets to the ground state baryons are given in terms of only 3 independent couplings. The large-${N}_{c}$ predictions for the ratios of strong couplings are tested against experimental data.

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