The $B$ meson decay modes $B\to Dp\overline{p}$ and $B\to D^{*}p\overline{p}$ have been studied using $29.4\mathrm{f}{\mathrm{b}}^{\mathrm{-}\mathrm{1}}$ of data collected with the Belle detector at KEKB. The ${\overline{B}}^0\to D^{0}p\overline{p}$ and ${\overline{B}}^0\to D^{*0}p\overline{p}$ decays have been observed for the first time with branching fractions $\mathcal{B}({\overline{B}}^0\to D^{0}p\overline{p})=(1.18\pm 0.15\pm 0.16)\times {10}^{-4}$ and $\mathcal{B}({\overline{B}}^0\to D^{*0}p\overline{p})=({1.20}_{-0.29}^{+0.33}\pm 0.21)\times {10}^{-4}$. No signal has been found for the $B^{+}\to D^{+}p\overline{p}$ and $B^{+}\to D^{*+}p\overline{p}$ decay modes, and the corresponding upper limits at $90\%$ C.L. are presented.

• Received 24 May 2002

DOI:https://doi.org/10.1103/PhysRevLett.89.151802