New Limit on Muon and Electron Lepton Number Violation from $K_L^0\to {\mu }^{\pm }{e}^{\mp }$ Decay

Abstract

The most sensitive experiment to date to search for the muon and electron lepton number violating decay $K_L^0\to {\mu }^{\pm }{e}^{\mp }$ has detected no events consistent with this process. Based on this result, the 90% confidence level upper limit on the branching fraction is $B(K_L^0\to {\mu }^{\pm }{e}^{\mp })<4.7\times 10^{-12}$.

6 pages, 4 figures

References in corpus (2)

• First Observation of the Rare Decay Mode K-long -> e+ e-
• Gauge-Independent Analysis of K_L --> e μin Left-Right Models

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