# Gravitational Production of Superheavy Dark Matter and Associated Cosmological Signatures

## TL;DR

This paper investigates how superheavy dark matter can be generated through gravitational effects during early universe phases, analyzing production during inflation and transition periods, and exploring observable cosmological signatures.

## Contribution

It introduces a comprehensive analysis of gravitational dark matter production during various early universe transition scenarios, including relic abundance and collider signals.

## Key findings

- Dark matter can be produced during inflation and transition periods.
- Relic abundance depends on transition smoothness.
- Potential cosmological collider signatures identified.

## Abstract

We study the gravitational production of super-Hubble-mass dark matter in the very early universe. We first review the simplest scenario where dark matter is produced mainly during slow roll inflation. Then we move on to consider the cases where dark matter is produced during the transition period between inflation and the subsequent cosmological evolution. The limits of smooth and sudden transitions are studied, respectively. The relic abundances and the cosmological collider signals are calculated.