Reconstruction of potentials of hybrid inflation in the light of primordial black hole formation
Feb 4, 2021
14 pages
Published in:
- JCAP 06 (2021) 054
- Published: Jun 30, 2021
e-Print:
- 2102.02461 [astro-ph.CO]
View in:
Citations per year
Abstract: (IOP)
The large enhancement of the primordial power spectrum of the curvature perturbation can seed the formation of primordial black hole, that can play as a dark matter component in the Universe. In the literature, the enhanced power spectrum was calculated from the inflationary potential. However, in this paper, we show that a potential of multi scalar fields can be reconstructed from a given power spectrum which is made of a scale-invariant one on large scales and the other with a peak on small scales. In this reconstructed potential, the slow-roll of the second field in the curved trajectory is responsible for the generation of a peak in the power spectrum on small scales through the isocurvature perturbation. With multi scalar fields, the reconstructed potential may not be unique and we can find different potentials from a given power spectrum.Note:
- 14 pages, 4 figures
- black hole: primordial
- inflation: model
- power spectrum: primordial
- black hole: formation
- potential: hybrid
- inflation: hybrid
- isocurvature: perturbation
- curvature: perturbation
- field theory: scalar
- dark matter
References(42)
Figures(6)