Reanalysis of Charmed-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>D</mml:mi></mml:math>-Meson Branching Fractions

We report a revised determination of charmed-$D$-meson absolute branching fractions based on complete reconstruction of $D\overline{D}$ events at the $\ensuremath{\psi}(3770)$. Two backgrounds, Cabibbo-suppressed and multi-${\ensuremath{\pi}}^{0}$ $D$ decays, are addressed in detail. The first measurement of the decay ${D}^{0}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ establishes the sensitivity to hitherto unobserved multi-${\ensuremath{\pi}}^{0}$ 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.