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Clusters of Primordial Black Holes

Belotsky, Konstantin M.; Dokuchaev, Vyacheslav I.; Eroshenko, Yury N. +7 more

The Primordial Black Holes (PBHs) are a well-established probe for new physics in the very early Universe. We discuss here the possibility of PBH agglomeration into clusters that may have several prominent observable features. The clusters can form due to closed domain walls appearance in the natural and hybrid inflation models whose subsequent ev…