Gravity waves and primordial black holes in scalar warm little inflation
May 17, 202126 pages
Published in:
- JCAP 12 (2021) 12, 052
- Published: Dec 23, 2021
e-Print:
- 2105.08045 [hep-ph]
View in:
Citations per year
Abstract: (IOP)
In warm inflation, dissipation due to the interactions of the inflaton field to other light degrees of freedom leads naturally to the enhancement of the primordial spectrum during the last 10-20 efolds of inflation. We study this effect in a variant of the Warm Little Inflaton model, where the inflaton couples to light scalars, with a quartic chaotic potential. These large fluctuations on re-entry will form light, evaporating Primordial Black Holes, with masses lighter than 10 g. But at the same time they will act as a source for the tensors at second order. The enhancement is maximal near the end of inflation, which result in a spectral density of Gravitational Waves (GW) peaked at frequencies f ∼ O(10-10) Hz today, and with an amplitude Ω ∼ 10. Although the frequency range is outside the reach of present and planned GW detectors, it might be reached in future high-frequency gravitational waves detectors, designed to search for cosmological stochastic GW backgrounds above MHz frequencies.Note:
- version accepted in JCAP; major revision, new figures and discussion on the primordial spectrum, main conclusion unchanged
- gravitational waves / theory
- inflation
- primordial black holes
- 98.80.-k
- 98.80.Cq
- 98.80.Es
- 98.80.Bp
- 11.10.Wx
- black hole: primordial
- inflaton: interaction
References(0)
Figures(13)
Loading ...