Primordial Black-Hole Dark Matter via Warm Natural Inflation

Abstract

We report on a study of the natural warm inflationary paradigm (WNI). We show two important new results arise in this model. One is that the observational constraints on the primordial power spectrum from the cosmic microwave background (CMB) can be satisfied without going beyond the Planck scale of the effective field theory. The second is that WNI can inevitably provide perfect conditions for the production of primordial black holes (PBHs) in the golden window of black-hole mass range ($10^{-16}-10^{-11}{M}_{\odot }$) where it can account for all of the the dark matter content of the universe while satisfying observational constraints.

6 pages, 2 figures, Minor corrections added. Figure is modified to incorporate cold inflationary power spectrum. Published in PLB

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• Observational Constraints on Warm Natural Inflation
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• WarmSPy: a numerical study of cosmological perturbations in warm inflation
• Large fluctuations and Primordial Black Holes
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• A generalized method of constraining Warm Inflation with CMB data
• Untangling PBH overproduction in $w$-SIGWs generated by Pulsar Timing Arrays for MST-EFT of single field inflation
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• Primordial Black Holes Dark Matter and Secondary Gravitational Waves from Warm Higgs-G Inflation
• Embedding Ultra slow-roll inflaton dynamics in Warm Inflation
• Perturbation Spectra of Warm Inflation in $f(Q,T)$ Gravity
• Inflationary Dynamics in Einstein-Gauss-Bonnet Gravity Using New Slow-Roll Approximations considering Generalised Reheating
• Big Bang Nucleosynthesis with $f(R)$ gravity scalarons and astrophysical consequences
• Warm multi natural inflation
• No Warm Inflation From a Vanilla Axion
• Reassessing constant-roll Warm Inflation
• Warm Inflation Beyond the Markovian Limit