Primordial Black Holes from Inflation and non-Gaussianity
Abstract
Primordial black holes may owe their origin to the small-scale enhancement of the comoving curvature perturbation generated during inflation. Their mass fraction at formation is markedly sensitive to possible non-Gaussianities in such large, but rare fluctuations. We discuss a path-integral formulation which provides the exact mass fraction of primordial black holes at formation in the presence of non-Gaussianity. Through a couple of classes of models, one based on single-field inflation and the other on spectator fields, we show that restricting to a Gaussian statistics may lead to severe inaccuracies in the estimate of the mass fraction as well as on the clustering properties of the primordial black holes.
Keywords
Cite
@article{arxiv.1801.09415,
title = {Primordial Black Holes from Inflation and non-Gaussianity},
author = {G. Franciolini and A. Kehagias and S. Matarrese and A. Riotto},
journal= {arXiv preprint arXiv:1801.09415},
year = {2018}
}
Comments
21 pages, 2 figures, v2: matching published version