Bethe-Salpeter treatment of Λ, ∑ resonances under harmonic confinement

The unequal-quark-mass problem of excited Λ, ∑ states is treated through a multichannel generalization of a relativistic Bethe-Salpeter treatment of the simpler (equal mass) problem of N, Λ as well as meson states, recently found to give excellent fits to the corresponding spectra. The present fits to the Λ, ∑ masses are fully in tune with the quality of the NL, ΛL results, as evidenced by the highly consistent values of the appropriate universal function F(M) representing the central (mass)2 for each N-supermultiplet, calculated with the same reduced spring constant and quark masses as employed earlier for NL, ΛL and meson states