4.7 Article

Seesaw neutrino determination of the dark matter relic density

Journal

PHYSICAL REVIEW D
Volume 104, Issue 8, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.104.083024

Keywords

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Funding

  1. F. R. S./FNRS under the Excellence of Science (EoS) project [30820817-be.h]
  2. IISN [4.4503.15]

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In this article, we demonstrate that the dark matter relic density can be produced through freeze-in within the usual type-I seesaw framework, augmented solely by a neutrino portal interaction. This simple freeze-in scenario, where dark matter is not in a seesaw state, involves slow, seesaw-induced decays of Higgs W and Z bosons. We identify two scenarios, with one predicting the existence of an observable neutrino line.
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.

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