Formation of superdense dark matter lumps at the radiation-dominated cosmological stage

V.S. Berezinsky1, V.I. Dokuchaev2 and Yu.N. Eroshenko3

Abstract

We study the process of superdense dark matter lump (DML) formation at the radiation-dominated stage of the Universe. High-magnitude density perturbations that lead to DML formation can be peaks in the inflationary perturbation spectrum or closed loops of cosmic strings. A model with superdense DMLs provides new opportunities for annihilation of particles having small annihilation cross-sections. Superdense DMLs can be detected by their tidal effect on gravitational wave detectors.

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