Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 4, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2023/04/033
Keywords
inflation; gravitational waves; sources; primordial black holes
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We explore the two-stage inflation regime in the hybrid cosmological alpha-attractors theory. The inflationary perturbations spectrum is consistent with the latest Planck/BICEP/Keck Array results due to the attractor properties of the model. However, at smaller scales, there may be a highly controllable peak of considerable width and position, which can lead to the abundant production of primordial black holes (PBH) and the generation of a stochastic background of gravitational waves (SGWB).
We investigate the two-stage inflation regime in the theory of hybrid cosmological alpha-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).
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