Flavor-Specific Inclusive B Decays to Charm CLEO Collaboration

We have measured the branching fractions for B → D̄X, B → DX, and B → D̄X`+ν, where “B” is an average over B0 and B+, “D” is a sum over D0 and D+, and “D̄” is a sum over D̄0 and D. From these results and some previously measured branching fractions, we obtain B(b → cc̄s) = (21.9 ± 3.7)%, B(b → sg) < 6.8% @ 90% c.l, and B(D0 → K−π+) = (3.69 ± 0.20)%. Implications for the “B semileptonic decay problem” (measured branching fraction being below theoretical expectations) are discussed. The increase in the value of B(b → cc̄s) due to B → DX eliminates 40% of the discrepancy. PACS numbers: 13.25Hw, 14.40.Nd SLAC-PUB-9832