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Sterile neutrino dark matter via coinciding resonances

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arxiv 2004.10766 v2 pith:MDDNYJSV submitted 2020-04-22 hep-ph

J. Ghiglieri , M. Laine This is my paper · ORCID
classification hep-ph
keywords neutrinossterileleptonasymmetrydarkgev-scalematterresonances
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

It has been proposed that two resonances could coincide in the early universe at temperatures $T \sim 0.2 ... 0.5$ GeV: one between two nearly degenerate GeV-scale sterile neutrinos, producing a large lepton asymmetry through freeze-out and decays; another between medium-modified active neutrinos and keV-scale sterile neutrinos, converting the lepton asymmetry into dark matter. Making use of a framework which tracks three sterile neutrinos of both helicities as well as three separate lepton asymmetries, and scanning the parameter space of the GeV-scale species, we establish the degree of fine-tuning that is needed for realizing this scenario.

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Cited by 4 Pith papers

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

  1. Probing Solar Heavy Neutrinos with Heliospheric Electrons

    astro-ph.HE 2024-12 conditional novelty 6.0 of 10

    Using Ulysses and SOHO MeV electron data, the authors set the strongest direct upper bound U_e^2 ~ 10^-6 on solar-produced heavy neutral leptons, reaching that value at a mass near 10 MeV.

  2. Low-scale seesaw with flavour and CP symmetries $\unicode{x2013}$ from colliders to leptogenesis

    hep-ph 2024-12 conditional novelty 6.0 of 10

    For four flavour-symmetry cases, this paper maps heavy-neutrino lifetimes, decay flavour ratios, and the parameter space where leptogenesis works and colliders can test it.

  3. Low-scale leptogenesis in the scotogenic model: spectator processes and benchmark points

    hep-ph 2024-11 conditional novelty 6.0 of 10

    TeV-scale leptogenesis in the scotogenic model is viable with proper treatment of spectator processes, yielding benchmark points that reproduce the baryon asymmetry and predict observable CLFV rates.

  4. Search for heavy neutral leptons in decays of W bosons produced in 13 TeV pp collisions using prompt signatures in the ATLAS detector

    hep-ex 2025-08 accept novelty 4.0 of 10

    The ATLAS search finds no evidence of heavy neutral leptons in W boson decays and sets the strongest limits to date on their mixing with electron and muon neutrinos in the 15-30 GeV mass range.

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