Predictions for semileptonic decays of charm baryons. I. SU(4)-symmetry limit

Abstract

We review the predictions of SU(4) symmetry and the Glashow-Iliopoulos-Maiani mechanism for the semileptonic decays of ${\mathrm{\textonehalf{}}}^{+}$ charm baryons. We use, wherever possible, the experimental masses of charm baryons; for the unknown masses we use the predictions of mass formulas. The ${q}^{2}$ dependence of form factors is taken to be either of monopole or of dipole form. For $\ensuremath{\Delta}S=\ensuremath{\Delta}Q=\ensuremath{-}1$ transitions, very large branching ratios are predicted---of the order of 10%.