Planck Scale Remnants in Resummed Quantum Gravity

TL;DR

This paper proposes a resummed quantum gravity approach predicting that massive black holes leave behind Planck scale remnants, which could decay into cosmic rays, providing observable signatures.

Contribution

It introduces a novel resummation method in quantum gravity that predicts black hole remnants at the Planck scale, accessible to our universe.

Findings

Black hole evaporation ends with a Planck scale remnant.

Remnants can decay into n-body final states.

Potential source of Planck scale cosmic rays.

Abstract

We show that, in a new approach to quantum gravity in which its UV behavior is tamed by resummation of large IR effects, the final state of the Hawking radiation for an originally very massive black hole is a Planck scale remnant which is completely accessible to our universe. This remnant would be expected to decay into n-body final states, leading to Planck scale cosmic rays.