Primordial Black Holes and Gravitational Waves in Hybrid Inflation with Chaotic Potentials

Understand

We study the formation of primordial black hole (PBH) dark matter and the generation of scalar induced secondary gravitational waves (SIGWs) in a non-supersymmetric model of hybrid inflation with chaotic (polynomial-like) potential, including one-loop radiative corrections.

• A radiatively corrected version of these models is entirely consistent with Planck's data.
• By adding non-canonical kinetic energy term in the lagrangian, the inflaton experiences a period of ultra-slow-roll, and the amplitude of primordial power spectrum is enhanced to $O(10^{-2})$.
• The enhanced power spectra of primordial curvature perturbations can have both sharp and broad peaks.