Primordial black holes and gravitational waves from non-canonical inflation

Primordial black holes (PBHs) can generically form in inflationary setups through the collapse of enhanced cosmological perturbations, providing us access to the early Universe through their associated observational signatures. In the current work we propose a new mechanism of PBH production within...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2023-03, Vol.2023 (3), p.3
Main Authors: Papanikolaou, Theodoros, Lymperis, Andreas, Lola, Smaragda, Saridakis, Emmanuel N.
Format: Article
Language:English
Subjects:
Black holes
Dark matter
Exponents
Gravitational waves
gravitational waves / theory
inflation
Perturbation
primordial black holes
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Summary:Primordial black holes (PBHs) can generically form in inflationary setups through the collapse of enhanced cosmological perturbations, providing us access to the early Universe through their associated observational signatures. In the current work we propose a new mechanism of PBH production within non-canonical inflation, using a class of steep-deformed inflationary potentials compatible with natural values for the non-canonical exponents. In particular, requiring significant PBH production we extract constraints on the non-canonical exponents. Additionally, we find that our scenario can lead to the formation of asteroid-mass PBHs, which can account for the totality of the dark matter, as well as to production of solar-mass PBHs within the LIGO-VIRGO detection band. Finally, we find that the enhanced cosmological perturbations which collapse to form PBHs can produce a stochastic gravitational-wave (GW) background induced by second-order gravitational interactions. Very interestingly, we obtain a GW signal detectable by future GW experiments, in particular by SKA, LISA and BBO.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2023/03/003