Evidence for penguin-diagram decays: First observation ofB→ $K^{*}$ (892)γ

Publisher Website

2 August 1993

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

Vol. 71 (5) , 674-678
https://doi.org/10.1103/physrevlett.71.674

Abstract

We have observed the decays

B^{0}

→

K^{*}

(892

)^{0}

γ and

B^{-}

→

K^{*}

(892

)^{-}

γ, which are evidence for the quark-level process b→sγ. The average branching fraction is (4.5±1.5±0.9)×

10^{- 5}

. This value is consistent with standard model predictions from electromagnetic penguin diagrams.

Keywords

CLEO

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