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

By K. Petraki, A. Kusenko. 2007

282 citations recorded by the source corpus.

Sterile 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.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9e18befa383884cf459607de4d071e734eb84bf0

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Citations in the corpus

The Dawn of FIMP Dark Matter: A Review of Models and Constraints (2017, background): “A useful estimate for the DM abundance in these scenarios can be given as [17, 18]”
Constraining light dark matter with diffuse X-ray and gamma-ray observations (2013, background): “, non-thermal production [8] or due to an extended Higgs sector [95, 96].”
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A lower bound on the mass of dark matter particles (2008, background): “Finally, we would like to comment on the mechanism of production of sterile neutrinos from decay of massive scalar field, for example the inflaton [69] (for other models see [57, 70, 71, 155]).”
The Role of Sterile Neutrinos in Cosmology and Astrophysics (2008, background): “ or to conﬁrm this model. We list below the νMSM predictions for experiments that are under way or will be carried out in the near future. 1. Nothing but the Higgs boson within the mass interval MH ∈ [129,189] GeV will be found at LHC [122, 40, 39]. 2. Neutrinoless double beta decay experiments. One”
Dark Matter Candidates from Particle Physics and Methods of Detection (2010, background): “At temperatures of T ∼ mS, this term also produces sterile neutrinos through the decays S → ν̄sνs, and this may be a significant source of colder sterile neutrinos (227; 228).”
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Lyman-alpha constraints on warm and on warm-plus-cold dark matter models (2008, background): “Sterile neutrinos having colder and warmer velocity components can also be produced through the decay of a gauge-singlet scalar, followed by a subsequent nonresonant production [87, 88, 89, 90, 91] (see also [92, 93] for other mechanisms of production of sterile neutrino).”
Sterile neutrino Dark Matter (2018, methodology): “rdial plasma. With the current approximations, and assuming that the inverse decay NN !˚can be neglected,41 the expression (53) reduces to the well-known form used in the seminal work [462] (see also [463,482]): @f N(p) @t Hp @f Np @p = 2m ˚ ~ 0 p2 Z 1 p+m2 ˚ =(4p) f ˚qd ˚q;: (53) If the eective num”
A White Paper on keV sterile neutrino Dark Matter (2016, background): “In particular, the “parent” S-particle can itself be in or out of thermal equilibrium at the time the sterile neutrinos are produced and, depending on the model, the decay into the sterile neutrinos may be the only possible decay channel [730] or one of many possible decay channels into light partic”
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Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos (2012, background): “(4)Inflation can be realized without modification of the gravitational interaction by adding an extra scalar to the νMSM [38] (see also [15, 39, 40]).”