A Measurement of the Branching Ratio $\frac{({K_{L}}^{0} \to π μ ν)}{({K_{L}}^{0} \to π e ν)}$

Publisher Website

25 August 1969

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

Vol. 23 (8) , 427-430
https://doi.org/10.1103/physrevlett.23.427

Abstract

We present the results of a study of

{K_{L}}^{0}

decays observed in the CERN 1.1-

m^{3}

heavyliquid bubble chamber. About 75 000 frames were scanned, and yielded some 7500 examples of isolated

{K_{L}}^{0}

decays to charged particles. Based on a sample of 4000 events in a restricted fiducial region, the following branching ratios were found:

\frac{N ({K_{L}}^{0} \to π^{\pm} μ^{\mp} ν)}{N ({K_{L}}^{0} \to π^{\pm} e^{\mp} ν)} = 0.648 \pm 0.030,

\frac{N ({K_{L}}^{0} \to π^{+} π^{-} π^{0})}{N ({K_{L}}^{0} \to all charged)} = 0.157 \pm 0.010.

Keywords

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