NA62 collaboration
Published 2024-09-03Version 1
The first search for the lepton number violating decay $K^+\to\pi^0\pi^-\mu^+e^+$ and lepton flavour violating decays $K^+\to\pi^0\pi^+\mu^-e^+$, $K^+\to\pi^0\pi^+\mu^+e^-$ has been performed using a dataset collected by the NA62 experiment at CERN in 2016-2018. Upper limits of $2.9\times 10^{-10}$, $3.1\times 10^{-10}$ and $5.0\times 10^{-10}$, respectively, are obtained at 90% CL for the branching ratios of the three decays on the assumption of uniform phase-space distributions.
Comments: arXiv admin note: substantial text overlap with arXiv:2211.04818
Search for the lepton flavour violating decays $B^{+} \to K^{+} τ^\pm \ell^\mp$ ($\ell = e, μ$) at Belle
First search for dark-trident processes using the MicroBooNE detector
First search for $K_{L}\toπ^{0}π^{0}ν\barν$
![QR code for arXiv:2409.12981 [hep-ex]](http://oss.arxitics.com/images/favicon.svg)