InclusiveB-meson decays into charm

Abstract

We have measured the B-meson decay fractions into $D^0$, $D^{+}$, and $D^{\mathrm{*}+}$ mesons to be 0.39±0.05±0.04, 0.17±0.04±0.04, and 0.22±${0.04}_{\mathrm{-}0.04}^{+0.07\mathrm{}}$, respectively, if we use the $D^0$→$K^{\mathrm{-}}$ ${\pi }^{+}$ and $D^{+}$→$K^{\mathrm{-}}$ ${\pi }^{+}$ ${\pi }^{+}$ branching ratios determined by the Mark III Collaboration. These results suggest that B decay to noncharm final states is substantial. We also find that B decay to spin-1 $D^{\mathrm{*}}$ mesons dominates over direct decay to spin-0 D mesons and that the ratio ($D^0$+$D^{\mathrm{*}0}$)/($D^{+}$+$D^{\mathrm{*}+}$) is consistent with unity.