Reanalysis of Charmed-D-Meson Branching Fractions

Abstract

We report a revised determination of charmed-$D$-meson absolute branching fractions based on complete reconstruction of $D\overline{D}$ events at the $\psi \mathrm{}\left(3770\right)\mathrm{}$. Two backgrounds, Cabibbo-suppressed and multi-${\pi }^0$ $D$ decays, are addressed in detail. The first measurement of the decay $D^0\to K^{-}{\pi }^{+}{\pi }^0{\pi }^0$ establishes the sensitivity to hitherto unobserved multi-${\pi }^0$ modes. Removal of both backgrounds reduces the values of our previously reported branching fractions by (21-24)%, leaving their ratios largely unchanged. The new values are unable to account fully for a reported deficit in charm production in $B$-meson decay.