Measurement of the Branching Fractions for Inclusive $B^{-}$ and ${\bar{B}}^0$ Decays to Flavor-tagged $D$, $D_s$ and ${\Lambda }_c$

Abstract

We report on the inclusive branching fractions of $B^{-}$ and of ${\bar{B}}^0$ mesons decaying to $D^{0}X$, ${\bar{D}}^{0}X$, $D^{+}X$, $D^{-}X$, $D_s^{+}X$, $D_s^{-}X$, ${\Lambda }_c^{+}X$, ${\bar{\Lambda }}_c^{-}X$, based on a sample of 88.9 million $B\bar{B}$ events recorded with the $BABAR$ detector at the ${\rm Y}(4S)$ resonance. Events are selected by completely reconstructing one $B$ and searching for a reconstructed charmed particle in the rest of the event. We measure the number of charmed and of anti-charmed particles per $B$ decay and derive the total charm yield per $B^{-}$ decay, $n_c^{-}=1.313\pm 0.037\pm 0.062_{-0.042}^{+0.063}$, and per ${\bar{B}}^0$ decay, $n_c^0=1.276\pm 0.062\pm 0.058_{-0.046}^{+0.066}$ where the first uncertainty is statistical, the second is systematic, and the third reflects the charm branching-fraction uncertainties.

8 pages, 6 Encapsulated PostScript figures submitted to Phys. Rev. D (Rapid Communications)

References in corpus (3)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Measurement of the Branching Fractions for the Exclusive Decays of B^0 and B^+ to Dbar^(*)D^(*)K
• Inclusive b Decays to Wrong Sign Charmed Mesons

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• Inclusive Lambda_c Production in e^+e^- Annihilations at sqrt{s}=10.54 GeV and in Upsilon(4S) Decays
• Enhancement of the hadronic b quark decays
• Observation of B^+ -> \barΞ_c^0Λ_c^+ and Evidence for B^0 -> \barΞ_c^-Λ_c^+
• Study of Inclusive B- and Bbar0 Decays to Flavor-Tagged D, D_s and Lambda_c
• Measurement of the Ratio ${\cal B}\xspace(\B^+ \to X e ν)$ / ${\cal B}\xspace(\B^0 \to X e ν)