Leptogenesis enabled by dark matter

We propose that weak scale leptogenesis via ~ 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 φ is displaced a long distance from its origin by the thermal p...

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Veröffentlicht in:	Physical review. D 2022-08, Vol.106 (3), Article 035006
Hauptverfasser:	Croon, Djuna, Davoudiasl, Hooman, Houtz, Rachel
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Sprache:	eng
Schlagworte:	baryogenesis & leptogenesis cosmology particle dark matter PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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container_title	Physical review. D
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creator	Croon, Djuna Davoudiasl, Hooman Houtz, Rachel
description	We propose that weak scale leptogenesis via ~ 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 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 DM population made up of both X and φ is a typical outcome in our framework.
doi_str_mv	10.1103/PhysRevD.106.035006
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title	Leptogenesis enabled by dark matter
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