Black hole gas in TeV-gravity models

TL;DR

This paper investigates the behavior of a black hole gas in a high-temperature plasma within TeV-scale gravity models, analyzing black hole production, evaporation, and interactions under various conditions.

Contribution

It introduces a comprehensive model of black hole dynamics in a plasma, including formation, evaporation, and collisions, considering the effects of cosmic expansion.

Findings

The system can evolve along two distinct paths depending on initial temperature.

Black hole production and evaporation significantly influence plasma evolution.

Black hole collisions can lead to larger black holes under certain conditions.

Abstract

In a plasma at temperature close to the fundamental scale a small fraction of particles will experience transplanckian collisions that may result in microscopic black holes (BHs). We study the dynamics of a system (a black hole gas) defined by radiation at a given temperature coupled to a distribution of BHs of different mass. Our analysis includes the production of BHs in photon-photon collisions, BH evaporation, the absorption of radiation, collisions of two BHs to give a larger one, and the effects of the expansion. We find that the system may follow two different generic paths depending on the initial temperature of the plasma.