Inflection-point Inflation and Dark Matter Redux

Abstract

We investigate for viable models of inflation that can successfully produce dark matter (DM) from inflaton decay process, satisfying all the constraints from Cosmic Microwave Background (CMB) and from some other observations. In particular, we analyze near-inflection-point small field inflationary scenario with non-thermal production of fermionic DM from the decaying inflaton field during the reheating era. To this end, we propose two different models of inflation with polynomial potential. The potential of Model I contains terms proportional to linear, quadratic, and quartic in inflaton; whereas in Model II, the potential contains only even power of inflaton and the highest term is sextic in inflaton. For both the models, we find out possible constraints on the model parameters which lead to proper inflationary parameters from CMB data with a very small tensor-to-scalar ratio, as expected from a small-field model. With the allowed parameter space from CMB, we then search for satisfactory relic abundance for DM, that can be produced from inflaton via reheating, to match with the present-day cold dark matter (CDM) relic density for the parameter spaces of the DM $\chi$ mass and Yukawa couplings in the range $10^{-9}\gtrsim y_{\chi }\gtrsim 10^{-15}$ and $10^3\text{GeV}\lesssim m_{\chi }\lesssim 10^9\text{GeV}$. The DM relic is associated with the inflection-points in each model via maximum temperature reached in the early universe during its production. Finally, we find out allowed parameter space coming out of combined constraints from stability analysis for both SM Higgs and DM decays from inflaton as well as from BBN and Lyman-$\alpha$ bounds.

39 pages, 18 figures, accepted for publication in JHEP

References in corpus (36)

• Reheating in Inflationary Cosmology: Theory and Applications
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Inflationary Cosmology
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• Dark matter production in the early Universe: beyond the thermal WIMP paradigm
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• Gauge invariant MSSM inflaton
• Flaxion: a minimal extension to solve puzzles in the standard model
• A Delicate Universe
• Inflaton Oscillations and Post-Inflationary Reheating
• The minimal model of fermionic dark matter
• How warm are non-thermal relics? Lyman-$\alpha$ bounds on out-of-equilibrium dark matter
• On Thermal Gravitational Contribution to Particle Production and Dark Matter
• Cold keV dark matter from decays and scatterings
• The Standard Model Higgs Boson-Inflaton and Dark Matter
• Lyman-$\alpha$ constraints on freeze-in and superWIMPs
• Unifying inflation and dark matter with neutrino masses
• Doubly peaked induced stochastic gravitational wave background : Testing baryogenesis from primordial black holes
• Predictions on mass of Higgs portal scalar dark matter from Higgs inflation and flat potential
• Chaotic inflation, radiative corrections and precision cosmology
• Feebly Interacting Dark Matter Particle as the Inflaton
• Inflation and Dark Matter in the Inert Doublet Model
• Warm Inflection
• Volume modulus inflection point inflation and the gravitino mass problem
• Inflection-point Higgs Inflation
• Small Field Coleman-Weinberg Inflation driven by Fermion Condensate
• $B$-mode forecast of CMB-Bh$\overline{a}$rat
• Polynomial Inflation and Dark Matter
• Inflation might be caused by the right
• Non-thermal Production of PNGB Dark Matter and Inflation
• Baryogenesis from a right-handed neutrino condensate
• Gravity triggered neutrino condensates
• Momentum distribution of dark matter produced in inflaton decay: effect of inflaton mediated scatterings
• Bound on largest $r\lesssim 0.1$ from sub-Planckian excursions of inflaton
• Running of Running of the Spectral Index and WMAP Three-year data
• Freeze-In of radiative keV-scale neutrino dark matter from a new $\text{U}(1{)}_{\text{B-L}}$

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• Post-inflationary Leptogenesis and Dark Matter production: Metric versus Palatini formalism
• Post-inflationary production of particle Dark Matter: Hilltop and Coleman-Weinberg inflation