Hybrid α-attractors, primordial black holes and gravitational wave backgrounds
Matteo Braglia, Andrei Linde, Рената Каллош, F. Finelli⋆
Abstract
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).
Topics & Concepts
PhysicsPrimordial black holeAttractorInflation (cosmology)Gravitational wave backgroundGravitational wavePlanckBlack hole (networking)Spectral densityAstrophysicsTheoretical physicsBinary black holeRouting protocolRouting (electronic design automation)Mathematical analysisStatisticsLink-state routing protocolMathematicsComputer scienceComputer networkCosmology and Gravitation TheoriesBlack Holes and Theoretical PhysicsPulsars and Gravitational Waves Research