The NA62 experiment at CERN took data in 2016–2018 with the main goal of measuring the K+ → π+νν ̄ decay. The NA62 dataset is also exploited to search for light feebly interacting particles produced in kaon decays. Searches for K+ → e+N, K+ → μ+N and K+ → μ+νX decays, where N and X are massive invisible particles, are performed by NA62. The N particle is assumed to be a heavy neutral lepton,...
Despite the many successes of the Standard Model of Particle Physics, there are still several physical observations that it cannot explain, such as matter-antimatter asymmetry, non-zero neutrino masses, and the existence of dark matter. To address these limitations, extensions to the Standard Model are necessary, and a search for electric dipole moments of leptons is a valuable test. The...
