The 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 ''inclusive B branching ratio'' 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 is propagated from other measurements): {Beta}(B {yields} D{sup 0}X) = (0.636 {+-} 0.014 {+-} 0.019 {+-} 0.018), {Beta}(B {yields} D{sup +}X) = (0.235 {+-} 0.009 {+-} 0.009 {+-} 0.024), {Beta}(B {yields} D*{sup 0}X) = (0.247 {+-} 0.012 {+-} 0.018 {+-} 0.018), {Beta}(B {yields} D*{sup +}X) = (0.239 {+-} 0.011 {+-} 0.014 {+-} 0.009). The following ratio of branching ratios is not affected by most of the systematic errors: {Beta}(B {yields} D*{sup 0}X)/{Beta}(B {yields} D*{sup +}X) = (1.03 {+-} 0.07 {+-} 0.09 {+-} 0.08). We alsomore » 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 = 1.10 {+-} 0.05.« less