Improved upper limit on the branching ratio B( $K_{L}^{0}$ → $μ^{\pm}$ $e^{\mp}$ )

Publisher Website

22 February 1993

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

Vol. 70 (8) , 1049-1052
https://doi.org/10.1103/physrevlett.70.1049

Abstract

A search for the decay

K_{L}^{0}

→

μ^{\pm}

e^{\mp}

with significantly increased experimental sensitivity has yielded no events. The 90% confidence level limit on the branching ratio is B(

K_{L}^{0}

→

μ^{\pm}

e^{\mp}

)<3.9×

10^{- 11}

. When this data set is combined with earlier data the upper limit is 3.3×

10^{- 11}

.

Keywords

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