Sub-eV scalar dark matter through the super-renormalizable Higgs portal
arXiv:1003.2313 · doi:10.1103/PhysRevD.82.043533
Abstract
The Higgs portal of the Standard Model provides the opportunity for coupling to a very light scalar field $Ï$ via the super-renormalizable operator $Ï(H^\dagger H)$. 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 $Ï$ from its minimum.
6 pages, 3 figures. References added in the revised version.