Sub-eV scalar dark matter through the super-renormalizable Higgs portal

Details Sub-eV scalar dark matter through the super-renormalizable Higgs portal Sub-eV scalar dark matter through the super-renormalizable Higgs portal

2010-03-11

arxiv.org/abs/1003.2313v2

Phys. Rev. D82 043533 (2010)

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 3 figures. References added in the revised version.

Scientific paper

10.1103/PhysRevD.82.043533

The Higgs portal of the Standard Model provides the opportunity for coupling to a very light scalar field $\phi$ via the super-renormalizable operator $\phi(H^\dagger H)$. This allows for the existence of a very light scalar dark matter that has coherent interaction with the Standard Model particles and yet has its mass protected against radiative corrections. We analyze ensuing constraints from the fifth-force measurements, along with the cosmological requirements. We find that the detectable level of the fifth-force can be achieved in models with low inflationary scales, and certain amount of fine-tuning in the initial deviation of $\phi$ from its minimum.

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