Primordial Black Holes from String Inflation
High Energy Physics - Theory
2018-07-04 v2 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We present a single-field string inflationary model which allows for the generation of primordial black holes in the low mass region where they can account for a significant fraction of the dark matter abundance. The potential is typical of type IIB fibre inflation models and features a plateau at CMB scales and a near inflection point at large distance scales where the power spectrum is enhanced due to a period of ultra slow-roll. The tunability of the underlying parameters is guaranteed by scanning through the string landscape and their stability against quantum corrections is ensured by an effective shift symmetry.
Cite
@article{arxiv.1803.02837,
title = {Primordial Black Holes from String Inflation},
author = {Michele Cicoli and Victor A. Diaz and Francisco G. Pedro},
journal= {arXiv preprint arXiv:1803.02837},
year = {2018}
}
Comments
Updated references, typos fixed. Version submitted to JCAP