Sterile Neutrinos

Understand

Neutrinos, being the only fermions in the Standard Model of Particle Physics that do not possess electromagnetic or color charges, have the unique opportunity to communicate with fermions outside the Standard Model through mass mixing.

• Such Standard Model-singlet fermions are generally referred to as "sterile neutrinos''.
• In this review article, we discuss the theoretical and experimental motivation for sterile neutrinos, as well as their phenomenological consequences.
• With the benefit of hindsight in 2020, we point out potentially viable and interesting ideas.