# Dark matter as Planck relics without too exotic hypotheses

## TL;DR

This paper explores the hypothesis that dark matter consists of stable relics of microscopic black holes formed in the early Universe, requiring only a high-energy inflation scale and offering potential detection avenues.

## Contribution

It revisits the black hole relic dark matter hypothesis, emphasizing minimal new physics and analyzing formation, natural emergence, fine-tuning, and detection prospects.

## Key findings

- Dark matter can naturally originate from microscopic black hole relics.
- Formation of black holes requires only high-energy inflation.
- Potential detection methods are discussed.

## Abstract

The idea that dark matter could be made of stable relics of microscopic black holes is not new. In this article, we revisit this hypothesis, focusing on the creation of black holes by the scattering of trans-Planckian particles in the early Universe. The only new physics required in this approach is an unusually high-energy scale for inflation. We show that dark matter emerges naturally and we study the question of fine-tuning. We finally give some lines of thoughts for a possible detection.