Dmitry Gorbunov (Institute for Nuclear Research of the Russian Academy of Sciences / Moscow Institute of Physics and Technology) Dmitry Gorbunov (Russian Academy of Sciences (RU))
Supplemented with three right-handed sterile neutrinos the Standard Model can explain neutrino oscillations (active neutrino masses via seesaw type-I mechanism), baryon asymmetry of the Universe (via leptogenesis by sterile-active neutrino oscillations in the primordial plasma) and dark matter phenomenon (by a population of the lightest sufficiently long-lived sterile neutrino). This seems to be the minimal extension of the SM capable of addressing all the major phenomenological issues we have. The lightest sterile neutrino (the dark matter candidate) mass is in 1-50 keV range and the mass scale of the heavier two sterile neutrinos is 0.1-50 GeV. The model predictions for neutrino physics (e.g. low neutrinoless double beta decay rate), particle physics (direct production and decay of heavy sterile neutrinos at beam-dump experiments like SHiP and colliders like ee-FCC) and astophysics (cosmic X-rays due to dark matter sterile neutrino radiative decay) can be tested at the ongoing and future experiments.
Dmitry Gorbunov (Institute for Nuclear Research of the Russian Academy of Sciences / Moscow Institute of Physics and Technology)