http://arxiv.org/abs/1904.04840
We propose a minimal extension of the standard model of particle physics to accommodate cosmic inflation, dark matter and light neutrino masses. While the inflationary phase is obtained from a modified chaotic inflation scenario, consistent with latest cosmology data at $2\sigma$ level, the dark matter particle is a fermion singlet which remain out of equilibrium in the early universe. The scalar field which revives the chaotic inflation scenario by suitable modification also assists in generating tiny couplings of dark matter with its mother particle, naturally realising the non-thermal or freeze-in type dark matter scenario. Interestingly, the same assisting scalar field also helps in realising tiny Yukawa couplings required to generate sub-eV Dirac neutrino mass from neutrino couplings to the standard model like Higgs field. The minimality as well as providing a unified solution to all three problems keep the model predictive at experiments spanning out to all frontiers.
D. Borah, D. Nanda and A. Saha
Thu, 11 Apr 19
24/54
Comments: 18 pages, 4 figures