Primordial Black Holes and a Large Hidden Sector

TL;DR

This paper suggests that primordial black holes might have shorter lifespans due to a large hidden sector affecting their evaporation, which could help constrain the energy scale of gravity if such explosions are observed.

Contribution

It introduces the idea that a large hidden sector can significantly shorten primordial black hole lifetimes, impacting constraints on gravity's energy scale.

Findings

Primordial black holes may be shorter-lived with a large hidden sector.

Observation of black hole explosions can constrain gravity's energy scale.

Hidden sectors influence black hole evaporation processes.

Abstract

In this note we point out that primordial black holes could be much shorter lived than usually assumed if there is a large hidden sector of particles that only interacts gravitationally with the particles of the standard model. The observation of the explosion of one of these black holes would severely constrain the energy scale at which gravity becomes strong.