Quark model relations for b-baryon decay

Properties of b-baryon decay matrix elements (amplitudes) have been derived in a nonsymmetric quark model without any use of SU(6), SU(3), or SU(2) (isotopic spin) groups. Equalities between pairs of amplitudes are derived, and $\mathrm{\Lambda }-\mathrm{\Sigma }$ mixing is used to calculate the branching ratio for the transition ${\mathrm{\Lambda }}_b\to {\mathrm{\Sigma }}^0$.