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The Primordial Black Hole Formation from Single-Field Inflation is Not Ruled Out (2301.00599v1)

Published 2 Jan 2023 in astro-ph.CO, hep-ph, and hep-th

Abstract: A standard scenario to form primordial black holes in the early universe is based on a phase of ultra-slow-roll in single-field inflation when the amplitude of the short scale modes is enhanced compared to the CMB plateau. Based on general arguments, we show that the loop corrections to the large-scale linear power spectrum from the short modes are small and conclude that the scenario is not ruled out.

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