Primordial Black Holes from Inflation and Quantum Diffusion
Cosmology and Nongalactic Astrophysics
2018-07-26 v3 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
Primordial black holes as dark matter may be generated in single-field models of inflation thanks to the enhancement at small scales of the comoving curvature perturbation. This mechanism requires leaving the slow-roll phase to enter a non-attractor phase during which the inflaton travels across a plateau and its velocity drops down exponentially. We argue that quantum diffusion has a significant impact on the primordial black hole mass fraction making the classical standard prediction not trustable.
Cite
@article{arxiv.1804.07124,
title = {Primordial Black Holes from Inflation and Quantum Diffusion},
author = {Matteo Biagetti and Gabriele Franciolini and Alex Kehagias and Antonio Riotto},
journal= {arXiv preprint arXiv:1804.07124},
year = {2018}
}
Comments
25+12 pages, 12 figures. v3: Appendix added with comments in response to arXiv:1807.09057