Observation of $B^{0} \to p \bar{Λ} π^{-}$

Publisher Website

22 May 2003

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

Vol. 90 (20) , 201802
https://doi.org/10.1103/physrevlett.90.201802

Abstract

We report the first observation of the charmless hyperonic

B

decay,

B^{0} \to p \bar{Λ} π^{-}

, using a

78 {f b}^{- 1}

data sample recorded on the

Υ (4 S)

resonance with the Belle detector at KEKB. The measured branching fraction is

B (B^{0} \to p \bar{Λ} π^{-}) = ({3.97}_{- 0.80}^{+ 1.00} \pm 0.56) \times 10^{- 6}

. Searches for

B^{0} \to p \bar{Λ} K^{-}

and

p {\bar{Σ}}^{0} π^{-}

yield no significant signals and we set 90% confidence-level upper limits of

B (B^{0} \to p \bar{Λ} K^{-}) < 8.2 \times 10^{- 7}

and

B (B^{0} \to p {\bar{Σ}}^{0} π^{-}) < 3.8 \times 10^{- 6}

.

Keywords

CONFIDENCE LEVEL

All Related Versions

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