On nonleptonic decays of supermultiplets

By describing strong interactions between hadrons via a relativistic superm ultiplet scheme and regarding weak interactions as a perturbation thereof, we derive expressions for nonleptonic weak decay amplitudes in terms of con stituent quark masses and CKM angles, with no other parameters. Application of this method leads to DeltaI = 1/2 dominance in some pseudoscalar meson decays if one scales down the couplings of heavy particles by rootM mass fa ctors, in keeping with heavy quark theory expectations. However, certain B and D decay processes to kaons are badly predicted and point to substantial soft gluon renormalisation effects in W-quark interactions.