The Inclusive Decays

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semanticscholar（2007）

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摘要

We report new measurements of the diierential and total branching ratios for inclusive B decay to D 0 , D + and D + and the rst measurement of the same quantities for inclusive B decay to D 0. Here B is the mixture of B d and Bu from (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 rst error is statistical, the second systematic of this analysis, the third is propagated from other measurements): B(B ! D 0): We also report the rst measurement of the momentum-dependent D 0 polarization and a new measurement of the D + 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 c quarks produced in B decay to be

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