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Opening a new window for warm dark matter
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abstract
We explore the range of parameters for dark-matter sterile neutrinos in an extention of the Minimal Standard Model by three singlet fermions with masses below the electroweak scale (the $\nu$MSM). This simple model can explain a wide range of phenomena, including neutrino oscillations, baryogenesis, the pulsar velocities, and the early reionization. The presence of two heavier sterile neutrinos and the possibility of entropy production in their decays broadens the allowed range of parameters for the dark-matter sterile neutrinos (or other types of dark matter, for example, the gravitino). In addition, the primordial production of dark matter sterile neutrinos allows to escape most of the constraints.
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Cited by 1 Pith paper
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Dark matter mixing within the seesaw type II mechanism in the left-right symmetric model
In a left-right symmetric seesaw type II model, the active-sterile mixing of the lightest keV neutrino can be almost completely suppressed at special non-zero values of vL, creating dips in the dark matter mixing parameter.
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