New Mass Window for Primordial Black Holes as Dark Matter from Memory Burden Effect

Understand

The mass ranges allowed for Primordial Black Holes (PBHs) to constitute all of Dark Matter (DM) are broadly constrained.

• However, these constraints rely on the standard semiclassical approximation which assumes that the evaporation process is self-similar.
• Quantum effects such as memory burden take the evaporation process out of the semiclassical regime latest by half-decay time.
• What happens beyond this time is currently not known.