Inclusive decays B → DX and B → D X

We report new measurements of the differential and total branching ratios for inclusive B decay to D{sup 0}, D{sup +}, and D{sup *+} and the first measurement of the same quantities for inclusive B decay to D{sup *0}. Here B is the mixture of B{sub d} and B{sub u} from {Upsilon}(4S) decay. Furthermore, since more than one charm particle (or antiparticle) of the same kind can be produced in B decay, here {open_quotes}inclusive B branching ratio{close_quotes} is used to mean the average number of charm particles and their antiparticles of a certain species produced in B decay. We obtain the following results (the first error is statistical, the second systematic of this analysis, the third propagated from other measurements): B(B{r_arrow}D{sup 0}X)=(0.636{plus_minus}0.014{plus_minus}0.019{plus_minus}0.0 8), B(B{r_arrow}D{sup +}X)=(0.235{plus_minus}0.009{plus_minus}0.009{plus_minus}0.024), B(B{r_arrow}D{sup *0}X) =(0.247{plus_minus}0.012{plus_minus}0.018{plus_minus}0.018), B(B{r_arrow}D{sup *+}X)=(0.239{plus_minus}0.011{plus_minus}0.014{plus_minus}0. 09). The following ratio of branching ratios is not affected by most of the systematic errors: B(B{r_arrow}D{sup *0}X)/ B(B{r_arrow}D{sup *+}X)=(1.03{plus_minus}0.07{plus_minus}0.09{plus_minus}0.08). We also report the first measurement of the momentum-dependent D{sup *0} polarization and a new measurement of the D{sup *+} polarization in inclusive B decay. Using these measurements and other CLEO results and making some additional assumptions, we calculate the average number of c and {bar c} quarks produced in B decay to be {l_angle}n{sub c}{r_angle}=1.10{plus_minus}0.05. {copyright} {ital 1997} {ital The American Physical Society}