Pragmatic approach to the little hierarchy problem: the case for Dark Matter and neutrino physics

Details Pragmatic approach to the little hierarchy problem: the case for Dark Matter and neutrino physics Pragmatic approach to the little hierarchy problem: the case for Dark Matter and neutrino physics

2009-02-03

arxiv.org/abs/0902.0628v3

Phys.Rev.Lett.103:091802,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

discussion of multi singlet case added

Scientific paper

10.1103/PhysRevLett.103.091802

We show that the addition of real scalars (gauge singlets) to the Standard Model can both ameliorate the little hierarchy problem and provide realistic Dark Matter candidates. To this end, the coupling of the new scalars to the standard Higgs boson must be relatively strong and their mass should be in the 1-3 TeV range, while the lowest cutoff of the (unspecified) UV completion must be >~ 5 TeV, depending on the Higgs boson mass and the number of singlets present. The existence of the singlets also leads to realistic and surprisingly reach neutrino physics. The resulting light neutrino mass spectrum and mixing angles are consistent with the constraints from the neutrino oscillations.

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