Predictions for the semileptonic decays of charm baryons are given in two quark models: The nonrelativistic and the MIT bag models. We find that several processes have large branching ratios, of the order of few percent; these are very large in comparison with the strange-hyperon semileptonic-decay branching ratios. We also notice that the $q^2$ dependence overwhelms other corrections and should be considered in the future with more emphasis. Finally, the predictions found for the ${\Lambda }_c^{+}$ decay—when compared with the corresponding experimental value—leave ample room for the existence of a fourth generation.

• Received 16 March 1989

DOI:https://doi.org/10.1103/PhysRevD.40.2955