Sterile neutrino dark matter production in presence of non-standard neutrino self-interactions: an EFT approach

Understand

Sterile neutrinos with keV-scale masses are popular candidates for warm dark matter.

• In the most straightforward case they are produced via oscillations with active neutrinos.
• We introduce effective self-interactions of active neutrinos and investigate the effect on the parameter space of sterile neutrino mass and mixing.
• Our focus is on mixing with electron neutrinos, which is subject to constraints from several upcoming or running experiments like TRISTAN, ECHo, BeEST and HUNTER.