Constraining Primordial Black Hole Formation from Single-Field Inflation

Nov 7, 2022
9 pages
Published in:
  • Phys.Rev.Lett. 132 (2024) 22, 221003
  • Published: May 29, 2024
e-Print:
Report number:
  • RESCEU-20/22

Citations per year

2022202320242025117748
Abstract: (APS)
The most widely studied formation mechanism of a primordial black hole is collapse of large-amplitude perturbation on small scales generated in single-field inflation. In this Letter, we calculate one-loop correction to the large-scale power spectrum in a model with sharp transition of the second slow-roll parameter. We find that models producing an appreciable amount of primordial black holes induce nonperturbative coupling on a large scale probed by cosmic microwave background radiation. Our result implies that a small-scale power spectrum can be constrained by large-scale cosmological observations.
Note:
  • Accepted Physical Review Letters
  • black hole: primordial
  • black hole: formation
  • inflation
  • power spectrum
  • perturbation
  • cosmic background radiation
  • collapse