The Lightest of Black Holes

TL;DR

This paper explores black hole precursors in large N general relativity, calculating their masses and widths, and shows how increasing fields in a hidden sector can lower black hole masses to the TeV scale.

Contribution

It introduces a novel interpretation of graviton propagator poles as black hole precursors and calculates their properties in the large N limit.

Findings

Black hole precursor masses depend on the number of fields.

Masses can be lowered to TeV scale with many hidden sector fields.

Complex poles of the graviton propagator relate to black hole properties.

Abstract

In this paper we consider general relativity in the large $N$ limit, where $N$ stands for the number of particles in the model. Studying the resummed graviton propagator, we propose to interpret its complex poles as black hole precursors. Our main result is the calculation of the mass and width of the lightest of black holes. We show that the values of the masses of black hole precursors depend on the number of fields in the theory. Their masses can be lowered down to the TeV region by increasing the number of fields in a hidden sector that only interacts gravitationally with the standard model.