Freeze-in dark matter within the seesaw mechanism

Freeze-in dark matter within the seesaw mechanism

Blog Article

We show that the minimal Type-I Seesaw mechanism can successfully account for the observed dark matter Mantle Clock abundance in the form of a keV sterile neutrino.This population can be produced by the decay of the heavier neutral leptons, with masses above the electroweak mass scale, while they are in thermal equilibrium in the early Universe (freeze-in).Moreover, the implementation of the relevant phenomenological constraints (relic abundance, Face Covers indirect detection and structure formation) on this model automatically selects a region of the parameter space featuring an approximate lepton number symmetry.