New limits on heavy neutrinos at NA62

The NA62 experiment at CERN collected a large sample of charged kaon decays in flight with a minimum bias trigger in 2007. Upper limits on the rate of the charged kaon decay into a muon and a heavy neutrino obtained from this data are reported for a range of heavy neutrino masses. Prospects for similar searches using data collected in 2015 are also reported

NA62 results on Dark Sector searches

NA62 is a precision physics experiment studying charged kaons and their decayproducts with an unprecedented accuracy (measurement of the K + → π + ννbranching ratio of the order of 10 −11), allowing indirect probes of new physicsscales up to O(100) TeV. NA62 experiment also searches directly for weaklyinteracting particles of up to O(100) MeV masses in kaon decays and up to O(1)GeV masses when running in the beam dump mode. For both modes of directsearches, NA62 has been collecting data since 2021 after a successful 2016-18run 1. Past results and future prospects are presented in this talk