http://arxiv.org/abs/2211.14262
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 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).
M. Braglia, A. Linde, R. Kallosh, et. al.
Mon, 28 Nov 22
52/93
Comments: 39 pages, 12 figures