Flavor-Specific Inclusive B Decays to Charm

Abstract

We have measured the branching fractions for B -> D_bar X, B -> D X, and B -> D_bar X \ell^+ ν, where ``B'' is an average over B^0 and B^+, ``D'' is a sum over D^0 and D^+, and``D_bar'' is a sum over D^0_bar and D^-. From these results and some previously measured branching fractions, we obtain Br(b -> c c_bar s) = (21.9 $\pm$ 3.7)%, Br(b -> s g) < 6.8% @ 90% c.l, and Br(D^0 -> K^- π^+) = (3.69 $\pm$ 0.20)%. Implications for the ``B semileptonic decay problem'' (measured branching fraction being below theoretical expectations) are discussed. The increase in the value of Br(b -> c c_bar s) due to $B->DX$ eliminates 40% of the discrepancy.

12 page postscript file, postscript file also available through http://w4.lns.cornell.edu/public/CLNS

References in corpus (1)

• Measurement of the anti-B ---> D* pi lepton anti-neutrino(lepton) Branching Fraction

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