Exclusive and inclusive decays ofBmesons intoDsmesons

Abstract

We have studied the production of ${\mathit{D}}_{\mathit{s}}$ mesons in the decays of B mesons at the Υ(4S) resonance. We report on the first observation of exclusive B-meson decays B->${\mathit{D}}_{\mathit{s}}^{\mathrm{-}}$ ${\mathit{D}}^{\mathrm{*}+}$, B→${\mathit{D}}_{\mathit{s}}^{\mathrm{-}}$ ${\mathit{D}}^{+}$, and B→${\mathit{D}}_{\mathit{s}}^{\mathrm{-}}$ ${\mathit{D}}^0$. We also present a new measurement of the branching ratio and the momentum spectrum for the inclusive decay B→${\mathit{D}}_{\mathit{s}}$X.