TeV scale leptogenesis, inflaton dark matter, and neutrino mass in a scotogenic model

Borah, Debasish; Dev, P. S. Bhupal; Kumar, Abhass

doi:10.1103/PhysRevD.99.055012

Title: TeV scale leptogenesis, inflaton dark matter, and neutrino mass in a scotogenic model

Journal Article · Tue Mar 12 00:00:00 EDT 2019 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.99.055012· OSTI ID:1499064

Borah, Debasish; Dev, P. S. Bhupal; Kumar, Abhass

We consider the scotogenic model, where the standard model (SM) is extended by a scalar doublet and three Z₂ odd SM-singlet fermions (N_i, i = 1, 2, 3), all odd under an additional Z₂ symmetry, as a unifying framework for simultaneous explanation of inflation, dark matter, baryogenesis and neutrino mass. The inert doublet is coupled nonminimally to gravity and forms the inflaton. The lightest neutral particle of this doublet later becomes the dark matter candidate. Baryogenesis is achieved via leptogenesis by the decay of N₁ to SM leptons and the inert doublet particles. Neutrino masses are generated at the one-loop level. Explaining all these phenomena together in one model is very economic and gives us a new set of constraints on the model parameters. We calculate the inflationary parameters like spectral index, tensor-to-scalar ratio and scalar power spectrum, and find them to be consistent with the Planck 2018 constraints. We also do the reheating analysis for the inert doublet decays/annihilations to relativistic, SM particles. We find that the observed baryon asymmetry of the Universe can be obtained and the sum of light neutrino mass bound can be satisfied for the lightest Z₂ odd singlet fermion of mass around 10 TeV, dark matter in the mass range 1.25–1.60 TeV, and the lepton number violating quartic coupling between the SM Higgs and the inert doublet in the range of 6.5 × 10^–5 to 7.2 × 10^–5.

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Research Organization:: Washington Univ., St. Louis, MO (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0017987

OSTI ID:: 1499064

Alternate ID(s):: OSTI ID: 1612806

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 99 Journal Issue: 5; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 56 works

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