Decays of baryons in the U (6) × U (6) × U (3) symmetry scheme

Abstract

Assuming that the baryon states are represented by supermultiplets of the oscillator excitation group U (6) × U (6) × U (3), we calculate the two-body decay widths of the lowest sub-multiplets, where the couplings are invariant under the collinear group U (6) × U (2). A simpli­fied model of octet–octet mixing is considered, which generally demonstrates the importance of mixing in controlling decay widths. Mass splitting is accounted for by using average SU (6) masses (for a given orbital excitation) in the couplings and physical masses to calculate the phase space factors of the decays.