Speaker
Evgueni Goudzovski
(University of Birmingham)
Description
The NA62 experiment at CERN has collected a large sample of $K^+$ decays in flight during Run 1 in 2016-2018 and the ongoing Run 2 which started in 2021. Dedicated lepton-pair trigger lines have enabled a broad rare and forbidden decay programme. A review of searches for lepton flavour and number violating $K^+$ and $\pi^0$ decays with the NA62 lepton-pair dataset collected in 2016-2018 is presented. Ten final states have been investigated, improving on the world data in each case. Upper limits of the decay branching fractions are obtained typically at the $10^{-11}$ level, and the sensitivities are not limited by backgrounds. Prospects of the searches with the full NA62 dataset are also discussed.
Authors
Angela Romano
(University of Birmingham (GB))
Evgueni Goudzovski
(University of Birmingham)