Abstract
Several arguments for the dominance of certain types of non-leptonic weak decays of strange particles are examined for their applicability to high-mass hadrons. Arguments based on asymptotic freedom, duality, current algebra and PCAC, and coloured fermion quarks are all found to be weaker than for strange decays. Specific calculations in the Glashow-Iliopoulos-Maiani charm scheme yield total semi-leptonic decay rates of 20% or more. Estimates of branching ratios for two-body decays of charmed mesons are given, and remarks are made about charmed baryon decays.
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