Search for lepton number and flavour violation in K<sup>+</sup> and π<sup>0</sup> decays



Volpe, R, Akmete, A, Aliberti, R, Ambrosino, F, Ammendola, R, Angelucci, B, Antonelli, A, Anzivino, G, Arcidiacono, R, Bache, T
et al (show 90 more authors) (2022) Search for lepton number and flavour violation in K<sup>+</sup> and π<sup>0</sup> decays. .

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Abstract

The NA62 experiment at CERN collected a large sample of charged kaon decays into final states with multiple charged particles in 2016-2018. This sample provides sensitivities to rare decays with branching ratios as low as 10−11. Searches for the lepton number violating K+ → π−µ+e+ decay and the lepton flavour violating K+ → π+µ−e+ and π0 → µ−e+ decays are reported. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90% confidence level. These results improve by one order of magnitude over previous results for these decay modes.

Item Type: Conference or Workshop Item (Unspecified)
Depositing User: Symplectic Admin
Date Deposited: 13 Oct 2022 16:28
Last Modified: 18 Jan 2023 20:36
Open Access URL: https://pos.sissa.it/380/426/
URI: https://livrepository.liverpool.ac.uk/id/eprint/3165405