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Wash-In Leptogenesis

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arxiv 2011.09347 v2 pith:NIA4MHLH submitted 2020-11-18 hep-ph astro-ph.COhep-th

Valerie Domcke , Kohei Kamada , Kyohei Mukaida , Kai Schmitz , Masaki Yamada This is my paper · ORCID
classification hep-phastro-ph.COhep-th
keywords leptogenesiswash-inchemicalmechanismpotentialsstandardtemperaturesallowed
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We present a leptogenesis mechanism based on the standard type-I seesaw model that successfully operates at right-handed-neutrino masses as low as a few 100 TeV. This mechanism, which we dub "wash-in leptogenesis", does not require any CP violation in the neutrino sector and can be implemented even in the regime of strong wash-out. The key idea behind wash-in leptogenesis is to generalize standard freeze-out leptogenesis to a nonminimal cosmological background in which the chemical potentials of all particles not in chemical equilibrium at the temperature of leptogenesis are allowed to take arbitrary values. This sets the stage for building a plethora of new baryogenesis models where chemical potentials generated at high temperatures are reprocessed to generate a nonvanishing B-L asymmetry at low temperatures. As concrete examples, we discuss wash-in leptogenesis after axion inflation and in the context of grand unification.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Axion-driven spontaneous leptogenesis, precisely

    hep-ph 2026-08 conditional novelty 7.0 of 10

    Standard-misalignment axions coupled to strong or weak sphalerons can produce the observed baryon asymmetry at GUT-scale decay constants, whereas the vanilla Majoron scenario is ruled out by late-time dilution.

  2. Leptogenesis with sub-electroweak-scale reheating temperature

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Leptogenesis remains viable for reheating temperatures below sphaleron freeze-out in three perturbative monomial-inflaton scenarios, with blue-tilted primordial GWs as a potential probe.

  3. Feasibility Study of Lepton Number Violation in Rare $B$ and $K$ Meson Decays

    hep-ph 2026-01 conditional novelty 6.0 of 10

    Dimension-7 lepton-number-violating operators can make B→Kνν and K→πνν observable only in flavor-hierarchical scenarios (first lepton generation decoupled) or with a cutoff near 100-200 GeV; otherwise baryon washout a...

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