Strong decays of higher baryons in a quark model

Abstract

An SU(6)×O(3) model of baryons, which had earlier been used by Mitra and Ross for the evaluation of the strong decay widths of negative parity (70,1^-) baryons, is now extended to higher-lying baryonic states assumed to belong to the (56,2⁺) and (70,3^-) representations, as Regge recurrences of the supermultiplets (56,0⁺) and (70,1^-), respectively. Four different classes of supermultiplet transitions are examined. For the transitions (56,2⁺) → (56,0⁺), the results are in broad agreement with experiment, as well as those of SU(6)_W and previous quark-model calculations. For the transitions (56,2⁺) → (56,2⁺) and (56,2⁺) → (70,1^-), appreciable widths are predicted for several experimentally observable states, the first type being geometrically related to the N^*N_π coupling constant, and the second type being shown to involve a symmetry transition of only one unit (from symmetric to mixed symmetric wave functions). Results are also given for transitions from (70,3^-) states.