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arXiv · 2211.03395

Constraining Primordial Black Hole Formation from Single-Field Inflation

Jason Kristiano·Jun'ichi Yokoyama
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Abstract

The most widely studied formation mechanism of a primordial black hole is collapse of large-amplitude perturbation on small scales generated in single-field inflation. In this Letter, we calculate one-loop correction to the large-scale power spectrum in a model with sharp transition of the second slow-roll parameter. We find that models producing an appreciable amount of primordial black holes induce nonperturbative coupling on a large scale probed by cosmic microwave background radiation. Our result implies that a small-scale power spectrum can be constrained by large-scale cosmological observations.

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Jason Kristiano, Jun'ichi Yokoyama. 2022-11-07. Constraining Primordial Black Hole Formation from Single-Field Inflation. https://doi.org/10.1103/physrevlett.132.221003

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