Primordial Black Holes from $\alpha$-attractors

Understand

We consider primordial black hole (PBH) production in inflationary $\alpha$-attractors.

• We discuss two classes of models, namely models with a minimal polynomial superpotential as well as modulated chaotic ones that admit PBHs.
• We find that a significant amplification of the curvature power spectrum ${\cal P_R}$ can be realized in this class of models with a moderate tuning of the potential parameters.
• We consistently examine the PBH formation during radiation and additionally during reheating eras where the background pressure is negligible.