Breakdown of hawking evaporation opens new mass window for primordial black holes as dark matter candidate
Valentin Thoss, Andreas Burkert, Kazunori Kohri
Abstract
ABSTRACT The energy injection through Hawking evaporation has been used to put strong constraints on primordial black holes as a dark matter candidate at masses below 1017 g. However, Hawking’s semiclassical approximation breaks down at latest after half-decay. Beyond this point, the evaporation could be significantly suppressed, as was shown in recent work. In this study we review existing cosmological and astrophysical bounds on primordial black holes, taking this effect into account. We show that the constraints disappear completely for a reasonable range of parameters, which opens a new window below 1010 g for light primordial black holes as a dark matter candidate.
Topics & Concepts
HawkingDark matterWindow (computing)PhysicsPrimordial black holeHawking radiationAstrophysicsMicro black holeUniverseComputer scienceWorld Wide WebBinary black holeGravitational waveCosmology and Gravitation TheoriesQuantum Electrodynamics and Casimir EffectRelativity and Gravitational Theory