“School of Astronomy”
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| Paper IPM / Astronomy / 17919 |
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| Abstract: | |||||
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Using the �ôN formalism we calculate the one-loop correction to the large-scale power spectrum of the curvature
perturbation in the standard scenario where primordial black holes are formed in the early universe thanks to a phase
of ultra-slow-roll in single-field inflation. We explicitly show that one-loop corrections are negligible when the transition
from the ultra-slow-roll to the slow-roll phase is smooth. We conclude that the PBH formation scenario through a
ultra-slow-roll phase is viable.
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