New Measurement of $B \to D^{*} π$ Branching Fractions

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30 March 1998

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 80 (13) , 2762-2766
https://doi.org/10.1103/physrevlett.80.2762

Abstract

The decays

ϒ (4 S) \to B \bar{B}

, followed by

B \to D^{*} π

and

D^{*} \to D π

, permit reconstruction of all kinematic quantities that describe the sequence without reconstruction of the

D

, with reasonably low backgrounds. Using an integrated

e^{+} e^{-}

luminosity of

3.1 {fb}^{- 1}

accumulated at the

ϒ (4 S)

by the CLEO-II detector, we report measurements of

B ({\bar{B}}^{0} \to D^{* +} π^{-}) = (2.81 \pm 0.11 \pm 0.21 \pm 0.05) \times 10^{- 3}

and

B (B^{-} \to D^{* 0} π^{-}) = (4.34 \pm 0.33 \pm 0.34 \pm 0.18) \times 10^{- 3}

.

Keywords

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