Measurement of the $B^0\to D^{\ast-} D_s^{\ast+}$ and $D_s^+\toϕπ^+$ Branching Fractions

B. Aubert

doi:10.1103/PhysRevD.71.091104

paper

Measurement of the $B^{0} \to D^{-} D_{s}^{+}$ and $D_{s}^{+} \to ϕ π^{+}$ Branching Fractions

arXiv:hep-ex/0502041 · doi:10.1103/PhysRevD.71.091104

Abstract

We present measurements of the branching fractions $\BR(B^0\to D^{\ast-} D_s^{\ast+})$ and $\BR(D_s^+\toϕπ^+)$, based on $123 \times 1 0^{6}$ Y(4S)->BBbar decays collected by the BaBar detector at the PEP-II asymmetric-energy $e^{+} e^{-}$ B factory. A partial reconstruction technique is used to measure $\BR(B^0\to D^{\ast-} D_s^{\ast+})$ and the decay chain is fully reconstructed to measure the branching fraction product $\BR(B^0\to D^{\ast-} D_s^{\ast+})\times\BR(D_s^+\toϕπ^+)$. Comparing these two measurements provides a model-independent determination of the \Dsphipi\ branching fraction. We obtain $\BR(B^0\to D^{\ast-} D_s^{\ast+}) = (1.88 \pm 0.09 \pm 0.17)%$ and $\BR(D_s^+\toϕπ^+) = (4.81 \pm 0.52 \pm 0.38)%$, where the first uncertainties are statistical and the second systematic.

7 pages, 2 figures; being submitted to Phys. Rev. Lett

Measurement of the B0→D∗−Ds∗+​ and Ds+​→ϕπ+ Branching Fractions

Abstract

Cited by in corpus (18)

Measurement of the $B^{0} \to D^{-} D_{s}^{+}$ and $D_{s}^{+} \to ϕ π^{+}$ Branching Fractions