Closer look at white hole remnants

TL;DR

This paper examines the viability of white hole remnants as dark matter candidates, analyzing constraints, detection possibilities, and how black hole spectra are affected by evaporation and bouncing effects.

Contribution

It provides a detailed analysis of the constraints on white hole relics and explores their potential detectability and impact on black hole mass spectra.

Findings

White hole relics are severely constrained as dark matter candidates.

Possible detection paths for white hole remnants are identified.

Black hole mass spectra are distorted by bouncing effects and Hawking evaporation.

Abstract

The idea that, after their evaporation, Planck-mass black holes might tunnel into metastable white holes has recently been intensively studied. Those relics have been considered as a dark matter candidate. We show that the model is severely constrained and underline some possible detection paths. We also investigate, in a more general setting, the way the initial black hole mass spectrum would be distorted by both the bouncing effect and the Hawking evaporation.