Inflaton mass in the nuMSM inflation

Abstract

We analyse the reheating in the modification of \nuMSM (Standard Model with three right handed neutrinos with masses below the electroweak scale) where the sterile neutrino providing the Dark Matter is generated in decays of the additional inflaton field. We deduce that due to rather inefficient transfer of energy from the inflaton to the Standard Model sector reheating tends to happen at very low temperature, thus providing strict bounds on the coupling between the inflaton and the Higgs particles. This in turn translates to the bound on the inflaton mass, which appears to be very light 0.1 GeV <~ m_I <~ 10 GeV, or slightly heavier then two Higgs masses 300 GeV <~ m_I <~ 1000 GeV.

6 pages, 5 figures. Accepted in Phys.Lett.B. Journal version. Fixed formula for r

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• The Phenomenology of Right Handed Neutrinos
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• Scale invariance, unimodular gravity and dark energy
• Sterile Neutrinos as the Origin of Dark and Baryonic Matter
• keV sterile neutrino dark matter in gauge extensions of the standard model
• Light inflaton Hunter's Guide
• Unifying inflation with the axion, dark matter, baryogenesis and the seesaw mechanism
• Tensor to Scalar Ratio in Non-Minimal ${\varphi }^4$ Inflation
• Baryon Asymmetry of the Universe in the NuMSM
• Mixing of Active and Sterile Neutrinos
• Light inflaton after LHC8 and WMAP9 results
• The Higgs Portal to Cosmology
• Sterile Neutrino Dark Matter from Freeze-In
• Relic Gravity Waves and 7 keV Dark Matter from a GeV scale inflaton
• Cold Dark Matter from heavy Right-Handed neutrino mixing
• Flavour Mixing of Neutrinos and Baryon Asymmetry of the Universe
• Cold dark matter plus not-so-clumpy dark relics
• Resonant production of the sterile neutrino dark matter and fine-tunings in the [nu]MSM
• KeV Warm Dark Matter and Composite Neutrinos
• keV Sterile Neutrino Dark Matter and Neutrino Model Building
• Some constraints on the Yukawa parameters in the neutrino modification of the Standard Model (nuMSM) and CP-violation
• Dark matter, singlet extensions of the nuMSM, and symmetries
• Entropy Production in the Inflationary Epoch Using the Gouy-Stodola Theorem
• Heavy Light Inflaton and Dark Matter Production
• Search for dark Higgs inflaton with curvature couplings at LHC experiments
• Light inflaton model in a metastable Universe