Measurement of the branching fraction and decay rate asymmetry of $B^{-} \to D_{π^{+} π^{-} π^{0}} K^{-}$

Publisher Website

18 October 2005

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

Vol. 72 (7) , 071102
https://doi.org/10.1103/physrevd.72.071102

Abstract

We report the observation of the decay

B^{-} \to D_{π^{+} π^{-} π^{0}} K^{-}

, where

D_{π^{+} π^{-} π^{0}}

indicates a neutral

D

meson detected in the final state

π^{+} π^{-} π^{0}

, excluding

K_{S}^{0} π^{0}

. This doubly Cabibbo-suppressed decay chain can be used to measure the CKM phase

γ

. Using about

229 \times 10^{6}

e^{+} e^{-} \to B \bar{B}

events recorded by the BABAR experiment at the PEP-II

e^{+} e^{-}

storage ring, we measure the branching fraction

B (B^{-} \to D_{π^{+} π^{-} π^{0}} K^{-}) = (5.5 \pm 1.0 (stat .) \pm 0.7 (syst .)) \times 10^{- 6}

and the decay rate asymmetry

A (B^{-} \to D_{π^{+} π^{-} π^{0}} K^{-}) = - 0.02 \pm 0.16 (stat .) \pm 0.03 (syst .)

for the full decay chain.

Keywords

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This publication has 10 references indexed in Scilit:

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