The role of non-gaussianities in primordial black hole formation
By Vicente Atal, C. Germani. Physics of the Dark Universe, 2018
181 citations recorded by the source corpus.
We re-analyse current single-field inflationary models related to primordial black holes formation. We do so by taking into account recent developments on the estimations of their abundances and the influence of non-gaussianities. We show that, for all of them, the gaussian approximation, which is typically used to estimate the primordial black holes abundances, fails. However, in the case in which the inflaton potential has an inflection point, the contribution of non-gaussianities is only perturbative. Finally, we infer that only models featuring an inflection point in the inflationary potential, might predict, with a very good approximation, the desired abundances by the sole use of the gaussian statistics.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/3c0623f36b87e6bd44f89d3f7351f7f2b73608c5
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In Astronomy and Astrophysics
In Nuclear and High Energy Physics
Citations in the corpus
- Primordial Black Holes as Dark Matter: Recent Developments (2020, background): “[69] Vicente Atal and Cristiano Germani, “The role of non-gaussianities in Primordial Black Hole formation,” Phys.”
- Generating PBHs and small-scale GWs in two-field models of inflation (2020, background): “It is well known that non-Gaussianity strongly affect the primordial abundance of PBHs [113–119] and the SBGW [120].”
- Steepest growth of the power spectrum and primordial black holes (2018, background): “The impact of non-Gaussianity on PBH formation during inflection point inflation was recently considered in [81].”
- Primordial black hole formation and abundance: contribution from the non-linear relation between the density and curvature perturbation (2019, background): “[45] V.”