Opening a new window for warm dark matter

Details Opening a new window for warm dark matter Opening a new window for warm dark matter

2006-02-16

arxiv.org/abs/hep-ph/0602150v2

Phys.Lett.B638:401-406,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, version to appear in Phys. Lett. B. A discussion of new constraints on properties of sterile neutrino, coming from X-

Scientific paper

10.1016/j.physletb.2006.05.067

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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