Searches for lepton flavour and lepton number violation in $K^{+}$ decays at NA62

Research output: Working paper/PreprintPreprint


Colleges, School and Institutes


A search for the lepton number violating $K^{+}\rightarrow\pi^{-}\mu^{+}e^{+}$ and lepton flavour violating $K^{+}\rightarrow\pi^{+}\mu^{-}e^{+}$ decays is reported using NA62 data collected in 2017 and 2018. No significant excess is observed above the background expectation and therefore upper limits are established on the branching ratios at $90\%$ confidence level: $\mathcal{B}(K^{+}\rightarrow\pi^{-}\mu^{+}e^{+})

Bibliographic note

6 pages, 3 figures, Prepared for the proceedings of the 40th International Conference on High Energy physics (ICHEP2020), July 28 - August 6, 2020


Original languageUndefined/Unknown
Publication statusPublished - 27 Oct 2020


  • hep-ex