Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector

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dc.creatorPetraki, Kalliopi
dc.creatorKusenko, Alexander
dc.date2007-11-29
dc.date2008-03-05
dc.date.accessioned2026-07-07T11:13:26Z
dc.date.available2026-07-07T11:13:26Z
dc.descriptionSterile neutrino with mass of several keV can be the cosmological dark matter, can explain the observed velocities of pulsars, and can play an important role in the formation of the first stars. We describe the production of sterile neutrinos in a model with an extended Higgs sector, in which the Majorana mass term is generated by the vacuum expectation value of a gauge-singlet Higgs boson. In this model the relic abundance of sterile neutrinos does not necessarily depend on their mixing angles, the free-streaming length can be much smaller than in the case of warm dark matter produced by neutrino oscillations, and, therefore, some of the previously quoted bounds do not apply. The presence of the gauge singlet in the Higgs sector has important implications for the electroweak phase transition, baryogenesis, and the upcoming experiments at the Large Hadron Collider and a Linear Collider.
dc.description12 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/0711.4646
dc.identifierhttp://arxiv.org/abs/0711.4646
dc.identifierPhys.Rev.D77:065014,2008
dc.identifierdoi:10.1103/PhysRevD.77.065014
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191719
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titleDark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
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