Hybrid α-attractors, primordial black holes and gravitational wave backgrounds
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- 1 April 2023
- journal article
- research article
- Published by IOP Publishing in Journal of Cosmology and Astroparticle Physics
- Vol. 2023 (04)
Abstract
We investigate the two-stage inflation regime in the theory of hybrid cosmological α-attractors. The spectrum of inflationary perturbations is compatible with the latest Planck/BICEP/Keck Array 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
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