Inert-Sterile Neutrino: Cold or Warm Dark Matter Candidate

Abstract

In usual particle models, sterile neutrinos can account for the dark matter of the Universe only if they have masses in the keV range and are warm dark matter. Stringent cosmological and astrophysical bounds, in particular imposed by X-ray observations, apply to them. We point out that in a particular variation of the inert doublet model, sterile neutrinos can account for the dark matter in the Universe and may be either cold or warm dark matter candidates, even for masses much larger than the keV range. These Inert-Sterile neutrinos, produced non-thermally in the early Universe, would be stable and have very small couplings to Standard Model particles, rendering very difficult their detection in either direct or indirect dark matter searches. They could be, in principle, revealed in colliders by discovering other particles in the model.

10 pages, 5 figures; version 2: small changes in the text and references added

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Cited by in corpus (37)

• A White Paper on keV Sterile Neutrino Dark Matter
• New Production Mechanism for keV Sterile Neutrino Dark Matter by Decays of Frozen-In Scalars
• Probing the scotogenic model with lepton flavor violating processes
• Restrictions on the lifetime of sterile neutrinos from primordial nucleosynthesis
• Constraining Sterile Neutrino Warm Dark Matter with Chandra Observations of the Andromeda Galaxy
• Can neutralinos in the MSSM and NMSSM scenarios still be light?
• An Extended Analysis of Heavy Neutral Leptons during Big Bang Nucleosynthesis
• FIMP realization of the scotogenic model
• Direct detection of fermion dark matter in the radiative seesaw model
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• Fermionic WIMPs and Vacuum Stability in the Scotogenic Model
• Parity Problem of the Scotogenic Neutrino Model
• Phenomenology of the Generalised Scotogenic Model with Fermionic Dark Matter
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• Scalar dark matter and fermion coannihilations in the radiative seesaw model
• Warm Dark Matter from keVins
• Dark matter direct detection of a fermionic singlet at one loop
• Probing Scotogenic Effects in Higgs Boson Decays
• Impact of Inert Higgsino Dark Matter
• Lepton Flavor Violation in the singlet-triplet scotogenic model
• Exploring X-Ray Lines as Scotogenic Signals
• A Model for Pseudo-Dirac Neutrinos: Leptogenesis and Ultra-High Energy Neutrinos
• Influence of a keV sterile neutrino on neutrino-less double beta decay -- how things changed in the recent years
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• Proton decay at 1-loop
• Global radiation signature from early structure formation
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• Radiative Scaling Neutrino Mass with $A_4$ Symmetry
• Constraining models for keV sterile neutrinos by quasi-degenerate active neutrinos
• Universal Scotogenic Fermion Masses in Left-Right Gauge Model