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arXiv · 2204.07584

Archimedean Lever Leptogenesis

Djuna Croon·Hooman Davoudiasl·Rachel Houtz
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Abstract

We propose that weak scale leptogenesis via $\sim 10$ TeV scale right-handed neutrinos could be possible if their couplings had transitory larger values in the early Universe. The requisite lifted parameters can be attained if a light scalar $\phi$ is displaced a long distance from its origin by the thermal population of fermions $X$ that become massive before electroweak symmetry breaking. The fermion $X$ can be a viable dark matter candidate; for suitable choice of parameters, the light scalar itself can be dark matter through a misalignment mechanism. We find that a two-component DM population made up of both $X$ and $\phi$ is a typical outcome in our framework.

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Djuna Croon, Hooman Davoudiasl, Rachel Houtz. 2022-04-15. Archimedean Lever Leptogenesis. https://arxiv.org/abs/2204.07584

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