Seesaw neutrino determination of the dark matter relic density
Rupert Coy, Aritra Gupta, Thomas Hambye
Abstract
In this article we show that in the usual type-I seesaw framework, augmented solely by a neutrino portal interaction, the dark matter (DM) relic density can be created through freeze-in, in a manner fully determined by the seesaw interactions and the DM particle mass. This simple freeze-in scenario, where dark matter is not in a seesaw state, proceeds through slow, seesaw-induced decays of Higgs $W$ and $Z$ bosons. We identify two scenarios, one of which predicts the existence of an observable neutrino line.
Topics & Concepts
Seesaw molecular geometryParticle physicsNeutrinoPhysicsDark matterHiggs bosonObservableQuantum mechanicsParticle physics theoretical and experimental studiesDark Matter and Cosmic PhenomenaNeutrino Physics Research