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Hybrid α-attractors, primordial black holes and gravitational wave backgrounds

2023; Institute of Physics; Volume: 2023; Issue: 04 Linguagem: Inglês

10.1088/1475-7516/2023/04/033

ISSN

1475-7516

Autores

Matteo Braglia, Andrei Linde, Рената Каллош, F. Finelli⋆,

Tópico(s)

Pulsars and Gravitational Waves Research

Resumo

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).

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