The Primordial Black Hole Formation from Single-Field Inflation is Still Not Ruled Out

TL;DR

This paper defends the viability of primordial black hole formation during single-field inflation, countering recent criticisms and reaffirming the scenario's plausibility in early universe cosmology.

Contribution

It provides a rebuttal to recent critiques, reaffirming that the standard ultra-slow-roll inflation scenario for primordial black hole formation remains plausible.

Findings

The scenario is not ruled out by recent criticisms.

Ultra-slow-roll inflation can still produce primordial black holes.

The paper clarifies misconceptions about the formation mechanism.

Abstract

In response to a recent criticism, appeared in arXiv:2303.00341, we argue that the standard scenario to form primordial black holes in the early universe based on a phase of ultra-slow-roll in single-field inflation is not ruled out.