B decays to charm hadrons at Belle

We report recent results of B decays to charm hadrons at Belle. For the decay B-bar 0 → Λc+Λc-, we find no significant signal and set an upper limit of B(B-bar 0 → Λc+Λc-) < 6.2 x 10-5 (90% C.L.). For the three-body decay B-bar 0 → Σc(2455)0 p-bar π+, we observe a large structure of the p-bar π+ mass near 1.5 GeV/c2. It indicates a cascade two-body decay B-bar 0 → Σc(2455)0 N-bar 0 and N-bar 0 → p-bar π+. For the first observation of B-bar 0 → Ds+Λ p-bar , we report its branching fraction as B( B-bar 0 → Ds+Λ p-bar ) (2.9±0.7(stat)±0.5(syst1)±0.4(syst2)x10-5. For B-bar 0 → Ds-D+ and its related decay B-bar 0 → Ds+Ds-, we report the branching fraction of B( B-bar 0 → Ds-D+) = [7.5 ± 0.2(stat)±0.8(syst)±0.8(Bs')]x10-3 and the upper limit of B( B-bar 0 → Ds+Ds-) < 3.6 x 10-5 (90% C.L.)