Study Of D Mesons Produced In Decay Of Psi-(3772)

From a study of $D$ mesons produced in the decay $\ensuremath{\psi}(3772)\ensuremath{\rightarrow}D\overline{D}$, we have determined the masses of the ${D}^{0}$ and ${D}^{+}$ mesons to be 1863.3\ifmmode\pm\else\textpm\fi{}0.9 ${\mathrm{M}\mathrm{e}\mathrm{V}/\mathit{c}}^{2}$ and 1868.3\ifmmode\pm\else\textpm\fi{}0.9 ${\mathrm{M}\mathrm{e}\mathrm{V}/\mathit{c}}^{2}$, respectively. Under the assumption that the $\ensuremath{\psi}(3772)$ has a definite isospin and decays only to $D\overline{D}$, the ${D}^{0}$ branching fractions to ${K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$, ${\overline{K}}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, and ${K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ are (2.2\ifmmode\pm\else\textpm\fi{}0.6)%, (4.0 \ifmmode\pm\else\textpm\fi{} 1.3)%, and (3.2\ifmmode\pm\else\textpm\fi{}1.1)% and the ${D}^{+}$ branching fractions to ${\overline{K}}^{0}{\ensuremath{\pi}}^{+}$ and ${K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{+}$ are (1.5\ifmmode\pm\else\textpm\fi{}0.6)% and (3.9\ifmmode\pm\else\textpm\fi{}1.0)%.