The inclusive branching fraction for $B$-meson decay into $D^0$ mesons and the momentum spectrum of the $D^0$'s have been measured. $0.8\pm 0.2\pm 0.2 D^0$ per $B$ decay was found. The shape of the spectrum suggests an interesting picture of $B$-meson decay.

• Received 20 May 1983

DOI:https://doi.org/10.1103/PhysRevLett.51.347