Common origin of modified chaotic inflation, non thermal dark matter and Dirac neutrino mass. (arXiv:1904.04840v2 [hep-ph] UPDATED)
<a href="http://arxiv.org/find/hep-ph/1/au:+Borah_D/0/1/0/all/0/1">Debasish Borah</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Nanda_D/0/1/0/all/0/1">Dibyendu Nanda</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Saha_A/0/1/0/all/0/1">Abhijit Kumar Saha</a>
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, the dark matter particle is a fermion
singlet which remains 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 realizing the non-thermal or freeze-in type dark matter
scenario. Interestingly, the same assisting scalar field also helps in
realizing 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.
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, the dark matter particle is a fermion
singlet which remains 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 realizing the non-thermal or freeze-in type dark matter
scenario. Interestingly, the same assisting scalar field also helps in
realizing 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.
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