Searches for the lepton number violating K⁺→π⁻μ⁺e⁺ decay and lepton flavour violating decays K⁺→π⁺μ⁻e⁺ and π⁰→μ⁻e⁺ are reported, using NA62 data collected in 2017 and 2018. In the absence of a significant excess above the background in each channel, upper limits on the branching ratios are established at 90% confidence level: B(K⁺→π⁻μ⁺e⁺)<4.2×10, B(K⁺→π⁺μ⁻e⁺)<6.6×10⁻¹¹ , and B(π⁰→μ⁻e⁺)<3.2×10⁻¹⁰.
Searches for lepton flavour/number violation in K⁺ and π⁰ decays at the NA62 experiment
B. Angelucci;M. Giorgi;S. Giudici;G. Lamanna;R. Piandani;M. Sozzi;S. Venditti;
2022-01-01
Abstract
Searches for the lepton number violating K⁺→π⁻μ⁺e⁺ decay and lepton flavour violating decays K⁺→π⁺μ⁻e⁺ and π⁰→μ⁻e⁺ are reported, using NA62 data collected in 2017 and 2018. In the absence of a significant excess above the background in each channel, upper limits on the branching ratios are established at 90% confidence level: B(K⁺→π⁻μ⁺e⁺)<4.2×10, B(K⁺→π⁺μ⁻e⁺)<6.6×10⁻¹¹ , and B(π⁰→μ⁻e⁺)<3.2×10⁻¹⁰.File in questo prodotto:
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