Hadronic B Decays to Charmed Baryons

We study exclusive B decays to final states containing a charmed baryon within the pole model framework. Since the strong coupling for $\Lambda_b\bar B N$islargerthanthatfor$\Sigma_b \bar BN$,thetwo-bodycharmfuldecay$B^-\to\Sigma_c^0\bar p$hasaratelargerthan$\bar B^0\to\Lambda_c^+\bar p$astheformerproceedsviathe$\Lambda_b$polewhilethelatterviathe$\Sigma_b$pole\mathrm{.}Bythesametoken,thethree-bodydecay$\bar B^0\to\Sigma_c^{++}\bar p\pi^-$receiveslessbaryon-polecontributionthan$B^-\to\Lambda_c^+\bar p\pi^-$. However, because the important charmed-meson pole diagrams contribute constructively to the former and destructively to the latter, ${\mathrm{\Sigma }}_c^{++}\bar{p}{\pi }^{-}$ has a rate slightly larger than ${\mathrm{\Lambda }}_c^{+}\bar{p}{\pi }^{-}$. It is found that one quarter of the $B^-\to \Lambda_c^+\bar p\pi^-$ rate comes from the resonant contributions. We discuss the decays ${\bar{B}}^0\to {\mathrm{\Sigma }}_c^0\bar{p}{\pi }^{+}$ and $B^{-}\to {\mathrm{\Sigma }}_c^0\bar{p}{\pi }^0$ and stress that they are not color suppressed even though they can only proceed via an internal W emission.