Seesaw determination of the dark matter relic density

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 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.

arXiv comment6 pages, 1 figure

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Cited by in corpus (13)

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• Impact of high-scale Seesaw and Leptogenesis on inflationary tensor perturbations as detectable gravitational waves
• Dark matter produced from right-handed neutrinos
• FIMP Dark Matter from Leptogenesis in Fast Expanding Universe
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• Cosmological constraints on the decay of heavy relics into neutrinos
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