Measurement of the decay rate for the processKL0→μ+μ−

Publisher Website

1 April 1979

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

Vol. 19 (7) , 1965-1977
https://doi.org/10.1103/physrevd.19.1965

Abstract

The branching ratio

\frac{Γ (K_{L}^{0} \to μ^{+} μ^{-})}{Γ (K_{L}^{0} \to π^{+} π^{-})}

has been measured and found to be

{4.0}_{- 0.9}^{+ 1.4}

×

10^{- 6}

. With the same apparatus the branching ratio

\frac{Γ (K_{L}^{0} \to π^{+} π^{-})}{Γ (K_{L}^{0} \to all)}

has been measured to be (2.01±0.09)×

10^{- 3}

. The combination of these two results gives

\frac{Γ (K_{L}^{0} \to μ^{+} μ^{-})}{Γ (K_{L}^{0} \to all)} = {8.1}_{- 1.8}^{+ 2.8} \times 10^{- 9}

. This result is consistent with the lower bound predicted from the decay rate

K_{L} \to γ γ

and unitarity.

Keywords

This publication has 14 references indexed in Scilit:

Further Observation of the Decay ${K_{L}}^{0} \to μ^{+} μ^{-}$
Physical Review Letters, 1973
Observation of the Decay $K_{L}^{0} \to μ^{+} μ^{-}$
Physical Review Letters, 1973
Review of the KL → μ+μ− puzzle
Annals of Physics, 1973
Experimental Limits on the Decays ${K_{L}}^{0} \to μ^{+} μ^{-}, e^{+} e^{-}, and μ^{\pm} e^{\mp}$
Physical Review Letters, 1971
Search for KL → μ+μ− decay
Physics Letters B, 1970
Neutral Kaon Decays into Lepton Pairs
Physical Review D, 1970
Search for KL→ μ+μ− and KL→e+e− decays
Physics Letters B, 1969
Electromagnetic Contribution to the Decays $K_{S} \to l \bar{l}$ and $K_{L} \to l \bar{l}$
Physical Review B, 1969
Rare Decay Modes of the $η$ Meson as a Probe of Electromagnetic and Strong Interactions
Physical Review Letters, 1965
The electromagnetic structure and alternative decay modes of the π0
Il Nuovo Cimento (1869-1876), 1960