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Constraining the Initial Primordial Black Hole Clustering with CMB-distortion

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(2021)cite arxiv:2103.16369Comment: 5 pages, 2 figures.

Abstract

The merger rate of primordial black holes depends on their initial clustering. In the absence of primordial non-Gaussianity correlating short and large-scales, primordial black holes are distributed à la Poisson at the time of their formation. However, primordial non-Gaussianity of the local-type may correlate primordial black holes on large-scales. We show that future experiments looking for CMB $\mu$-distortion will test the hypothesis of initial primordial black hole clustering induced by local non-Gaussianity.

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