Speaker
Christopher John Parkinson
(Universite catholique de Louvain)
Description
Searches for heavy neutral lepton production in K+ --> e+N and K+ --> mu+N decays using the data set collected by the NA62 experiment at CERN in 2016-18 are presented. Upper limits on the elements of the extended neutrino mixing matrix $|U_{e4}|^2$ and $|U_{\mu4}|^2$ are established at the levels of $10^{-9}$ and $10^{-8}$, respectively, improving on the earlier searches for heavy neutral lepton production and decays in the kinematically accessible mass range. A search for the K+ --> mu+nuX decays, where X is an new light invisible particle, is also reported.
| Collaboration / Activity | NA62 |
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Primary author
Christopher John Parkinson
(Universite catholique de Louvain)
