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The $\nu$MSM, Inflation, and Dark Matter
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abstract
We show how to enlarge the $\nu$MSM (the minimal extension of the standard model by three right-handed neutrinos) to incorporate inflation and provide a common source for electroweak symmetry breaking and for right-handed neutrino masses. In addition to inflation, the resulting theory can explain simultaneously dark matter and the baryon asymmetry of the Universe; it is consistent with experiments on neutrino oscillations and with all astrophysical and cosmological constraints on sterile neutrino as a dark matter candidate. The mass of inflaton can be much smaller than the electroweak scale.
Forward citations
Cited by 6 Pith papers
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Multiple Populations of Same Sterile Neutrino as Dark Matter
A single sterile neutrino species can be produced by multiple early-universe mechanisms, yielding cold and warm dark matter populations with a two-humped momentum spectrum.
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The High-Energy Frontier of the Intensity Frontier: Closing the Dark Photon, Inelastic Dark Matter, and Muon g-2 Windows
Reanalysis of CHARM and NuCal beam-dump data nearly excludes inelastic dark matter as a full-abundance thermal relic in the MeV to GeV range for the benchmark splittings considered, and yields updated dark photon constraints.
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When direct detection constrains reheating temperature: freeze-in with stronger couplings and inflaton-seeded freeze-in
Stronger couplings or inflaton-seeded initial abundance allow freeze-in dark matter to match the relic density while evading DAMIC-M and PandaX bounds for reheating temperatures below the electroweak scale.
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Search for light scalar particles produced in Higgs boson decays in exclusive final states with two muons and two hadrons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
CMS obtains O(10^{-4}) upper limits on Higgs branching fraction to light scalars (0.4-2 GeV) decaying to muon-hadron pairs with lifetimes up to ~1 mm.
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Sterile Neutrino Dark Matter as a Probe of Inflationary Reheating
Inflaton decays during reheating can produce all of the observed sterile-neutrino dark matter with a branching ratio below 10^-4, evading X-ray bounds and making a future X-ray line a probe of the inflaton mass and re...
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Status of light inflaton: from inflation to laboratory
A sub-10 GeV Higgs-mixed inflaton fits ACT inflation data only if a free loop-correction parameter is tuned, and its surviving mass–mixing window is testable by SHiP, FASER2, and MATHUSLA.
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