The Neutrino Portal: sterile neutrinos, cosmology and other signatures
Aula Seminari (LNF)
Via Enrico Fermi, 40
00044 Frascati (Roma)
I discuss scenarios in which a dark light sector couples to the Standard Model via the so-called “neutrino portal”. A generic implication of this framework is the existence of gauge-singlet fermions (sterile neutrinos) that act as messengers between the dark sector and the active neutrinos. I show under which conditions cosmological constraints become inefficient and discuss what new phenomena neutrino oscillation experiments may be able to observe.