Study of Charmless Hadronic $B$ Meson Decays to Pseudoscalar-Vector Final States

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2 October 2000

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

Vol. 85 (14) , 2881-2885
https://doi.org/10.1103/physrevlett.85.2881

Abstract

We report results of searches for charmless hadronic

B

meson decays to pseudoscalar(

π^{\pm}

,

K^{\pm}

,

π^{0}

, or

K_{S}^{0}

)-vector(

ρ

,

K^{*}

, or

ω

) final states. By using

9.7 \times 10^{6}

B \bar{B}

pairs collected with the CLEO detector, we report the first observation of

B^{-} \to π^{-} ρ^{0}

,

{\bar{B}}^{0} \to π^{\pm} ρ^{\mp}

, and

B^{-} \to π^{-} ω

, which are expected to be dominated by hadronic

b \to u

transitions. The measured branching fractions are

({10.4}_{- 3.4}^{+ 3.3} \pm 2.1) \times 10^{- 6}

,

({27.6}_{- 7.4}^{+ 8.4} \pm 4.2) \times 10^{- 6}

, and

({11.3}_{- 2.9}^{+ 3.3} \pm 1.4) \times 10^{- 6}

, respectively. Branching fraction upper limits are set for all of the other decay modes investigated.

Keywords

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