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Leptogenesis enabled by dark matter

Croon, Djuna and Davoudiasl, Hooman and Houtz, Rachel (2022) 'Leptogenesis enabled by dark matter.', Physical Review D, 106 (3).


We propose that weak scale leptogenesis via ∼10TeV 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 ϕ 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 dark matter population made up of both X and ϕ is a typical outcome in our framework.

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Publisher statement:Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Date accepted:08 July 2022
Date deposited:29 September 2022
Date of first online publication:05 August 2022
Date first made open access:29 September 2022

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