Hybrid $\alpha$-attractors, primordial black holes and gravitational wave backgrounds
Cosmology and Nongalactic Astrophysics
2023-05-11 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We investigate the two-stage inflation regime in the theory of hybrid cosmological -attractors. The spectrum of inflationary perturbations is compatible with the latest Planck/BICEP/Keck results, thanks to the attractor properties of the model. However, at smaller scales, it may have a very high peak of controllable width and position, leading to a copious production of primordial black holes (PBH) and generation of a stochastic background of gravitational waves (SGWB).
Keywords
Cite
@article{arxiv.2211.14262,
title = {Hybrid $\alpha$-attractors, primordial black holes and gravitational wave backgrounds},
author = {Matteo Braglia and Andrei Linde and Renata Kallosh and Fabio Finelli},
journal= {arXiv preprint arXiv:2211.14262},
year = {2023}
}
Comments
39 pages, 12 figures, v2: references added, minor modifications, matches JCAP version