Rare kaon decaysK+→π+l+l−: A reappraisal

1 March 1991

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

Vol. 43 (5) , 1568-1571
https://doi.org/10.1103/physrevd.43.1568

Abstract

We reexamine the various contributions to

K^{+} \to π^{+} l^{+} l^{-}

using recent experimental and theoretical advances as input. The decay is shown to be dominated by long-distance contributions which are now calculable. We present the expected spectra and predict

\frac{Γ (K^{+} \to π^{+} μ^{+} μ^{-})}{Γ (K^{+} \to π^{+} e^{+} e^{-})} = 0.24

Keywords

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