Abstract
Sterile Neutrinos with a mass in the keV range form a good candidate for dark matter. They are naturally produced from neutrino oscillations via their mixing with the active neutrinos. However the production via non-resonant neutrino oscillations has recently been ruled out. The alternative production via Higgs decay is negligibly small compared to neutrino oscillations. We show that in the neutrino-phillic two Higgs doublet model, the contribution from Higgs decay can dominate over the contribution from neutrino oscillations and evade all constraints. We also study the free-streaming horizon and find that a sterile neutrino mass in the range of 4 to 53 keV leads to warm dark matter.
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Adulpravitchai, A., Schmidt, M.A. Sterile neutrino dark matter production in the neutrino-phillic two Higgs doublet model. J. High Energ. Phys. 2015, 1–21 (2015). https://doi.org/10.1007/JHEP12(2015)023
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DOI: https://doi.org/10.1007/JHEP12(2015)023