In view of recent experimental trends we investigate the weak nonleptonic decays of charm baryons within the framework of the constituent quark model. Branching ratios and asymmetry parameters for all $++i++O-charm-changing modes are calculated with appropriate QCD corrections. The effect of flavor dependence on the scale is found to be quite significant.

With the inclusion of nonfactorized amplitudes in a scheme with N c = 3, we have studied Cabibbo-favored decays of D 0 and D + into two-body hadronic states involving two isospins in the final state. We have shown that it is possible to understand the measured branching ratios and determined the sizes and signs of nonfactorized amplitudes required.

In view of recent experimental trends we investigate the weak photonic decays of charmed baryons within the framework of the constituent quark model. Decay widths and asymmetry parameters for all i++f + + y charm-changing modes are calculated with appropriate QCD corrections. PACS number(s): 13.40. Hq, 12.40.Aa, 14.20.K~

We study the effects of mass averaging over the width of the p meson on branching ratios of D-PV decays. This smearing effect ensures lowering of these ratios in the required direction by about 25%. We calculate the smeared branchings for the Cabibbo-enhanced, -suppressed, and -doubly-suppressed D / D , -P p decays in the presence of final-state interactions. PACS number(s1: 13.25. f m , 14.40.Cs, 14.40.5~

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