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Sterile Neutrino Dark Matter
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We review sterile neutrinos as possible Dark Matter candidates. After a short summary on the role of neutrinos in cosmology and particle physics, we give a comprehensive overview of the current status of the research on sterile neutrino Dark Matter. First we discuss the motivation and limits obtained through astrophysical observations. Second, we review different mechanisms of how sterile neutrino Dark Matter could have been produced in the early universe. Finally, we outline a selection of future laboratory searches for keV-scale sterile neutrinos, highlighting their experimental challenges and discovery potential.
Forward citations
Cited by 19 Pith papers
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Opening up New Parameter Space for Sterile Neutrino Dark Matter
A new production channel, nu_a + nu_a -> nu_s + nu_s, mediated by a heavy scalar, can generate the observed sterile neutrino dark matter abundance independently of active-sterile mixing.
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BinaryGFH-v2: Improved method to search for gravitational waves from sub-solar-mass, ultra-compact binaries using the Generalized Frequency-Hough Transform
BinaryGFH-v2 is a modified GFH method that can search for inspiraling binaries with chirp masses 0.01–0.1 solar masses, validated in Gaussian noise and projected to constrain PBH dark matter.
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Constraining Heavy Neutral Leptons Coupled to the Tau-Neutrino Flavor at the Large Hadron Collider
DV searches with no prompt-lepton tag can probe HNLs with dominant tau-neutrino mixing at the LHC, improving existing bounds by more than an order of magnitude at Run 2 luminosity.
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Direct Collapse Black Hole Candidates from Decaying Dark Matter
Axion dark matter decay injects 1-13.6 eV photons that suppress H2, enabling atomic cooling halos and direct collapse black hole seeds for axion masses 24.5-26.5 eV and couplings down to 4e-12/GeV.
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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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Heavy Neutral Lepton Decay Searches using Solar Neutrinos
A new differential decay width including neutral and charged current interference is used to show that future detectors could probe HNL mixing angles over two orders of magnitude below current bounds.
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Decaying scalar dark matter in the minimal left-right symmetric model
The lightest neutral scalar of the SU(2)_R triplet in the minimal left-right model can serve as a long-lived decaying dark matter candidate in the keV to multi-MeV mass range, provided the left-right scale exceeds abo...
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Minimal Majoron Dark Matter from a Discrete $Z_N$ Gauge Symmetry
Discrete Z_N-protected majoron dark matter excludes Z_5, leaves Z_7/Z_11/Z_13 viable, and predicts a 1–10 MeV Z_7 majoron testable by COSI through 511 keV and γγ lines.
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Too Heavy to Hide: Gamma-Ray Constraints on Annihilating Dark Matter beyond Unitarity
Gamma-ray upper limits from five high-energy observatories constrain the annihilation cross sections of composite dark matter in the mass range 10^5--10^12 GeV.
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Lyman-$\alpha$ forest constraints on pure and mixed fuzzy dark matter
Lyman-alpha forest data yield m_FDM > 1.9e-21 eV (95% CL) for pure FDM and f_FDM upper limits of 0.07-0.65 for mixed FDM at log10(m_FDM/eV) = -23 to -21.
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Memory burden effect of regular primordial black holes
Combining regular black hole metrics with memory burden suppresses evaporation and opens a 10^6-10^8 g PBH mass window that can comprise all dark matter.
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Sterile neutrino Dark Matter in the minimal Dirac Seesaw
A minimal Dirac seesaw model yields viable sterile-neutrino dark matter via freeze-in, with the right-handed mixing angle θ_R bypassing X-ray bounds.
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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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New Particles at the Z-Pole: Tera-Z factories as discovery and precision machines
Tera-Z factories can produce millions of heavy neutral leptons and billions of axion-like particles under optimistic assumptions, turning them into exotics factories for discovery and detailed study.
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The Remote Analog to Digital Conversion DAQ System for the TRISTAN Detector Upgrade
A remote-ADC data acquisition system — 168-channel digitizer boards at 62.5 MS/s streaming 192 Gb/s over optical links into FPGA pulse-processing and histogramming — is designed and built for the TRISTAN upgrade of KATRIN.
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Search for heavy neutral leptons in decays of W bosons produced in 13 TeV pp collisions using prompt signatures in the ATLAS detector
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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Dark Matter and CP Violation in Some Symmetry-Constrained 3HDMs
S3-symmetric three-Higgs-doublet models allow dark matter in a 29-42 GeV window, exclude heavy candidates above 500 GeV, and admit MeV-scale light scalars, while continuous-symmetry variants produce mass-degenerate da...
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Searching for Dark Matter with MeVCube
Using Fisher forecasting, the author shows that a 2U to 12U MeVCube CubeSat could probe new dark matter parameter space for evaporating primordial black holes and MeV-scale decaying or annihilating dark matter.
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Decays of heavy scalars in the Grimus-Neufeld model
Computes tree-level two-body decays of heavy scalars in GNM and pseudoscalar lifetime in IDM limit.
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