CONSEQUENCES OF SU(3)'' EXCITATION IN BARYON RESONANCES

The SU(18) mass formula given earlier for the s3-configuration baryons in the three-triplet model is derived. Selection rules for allowed decays of SU(3)′′-excited baryon resonances are given using a new classification of mesons: among other selection rules, N(1466)→Δπ(Nππ), Nπ; and Z1(1910)→ΔK(NπK), NK, in the (no-mixing) approximation, where C2(3)′ and C2(3)′′ are good quantum numbers. The s3, JP=12+ resonances such as N(1466) and N(1751) should be produced with even sharper forward peaking than the corresponding elastic process. The N(1466) resonance should not be electro- or photoproduced, in contrast to the N(1751) resonance, which should be produced electromagnetically. Experiments to detect exotic resonances are suggested. The present limits on backward K-p elastic scattering are compatible with u-channel exchange of Z1(1910). A complete table of mass predictions for s3-configuration baryon resonances is given. © 1969 The American Physical Society.