We address several important issues in nonleptonic decays of charmed baryons. These include the treatment of the baryon matrix element of the effective weak Hamiltonian and the factorization in the quark-decay part of the amplitude. We also introduce an on-shell correction to the soft-pion limit of the current-algebra result for $S$ waves. This correction leads to significant changes in the decay rate and, in particular, the asymmetry parameter. A calculation of Cabibbo-favored $B_c\to B+P\left(0^{-}\right)$ decays of ${\Lambda }_c^{+}$, ${\Xi }_c^{0A}$, and ${\Xi }_c^{+A}$ (where $A$ indicates asymmetry in the noncharmed quarks) has been carried out. "Good candidates" for experimental tests have been suggested.

• Received 5 February 1992

DOI:https://doi.org/10.1103/PhysRevD.46.270