Escape of superheavy and highly energetic particles produced by particle collisions near maximally charged black holes

TL;DR

This paper demonstrates that superheavy, highly energetic particles produced near maximally charged black holes can escape to infinity, challenging previous assumptions about energy limits of particles escaping black hole collisions.

Contribution

It reveals that unlike uncharged black holes, maximally charged black holes can produce escaping superheavy particles with arbitrarily high energy, within classical theory.

Findings

Superheavy particles can escape from maximally charged black holes.

Escaping particles can have arbitrarily high energy and mass.

Classical theory allows for escape of highly energetic particles without backreaction effects.

Abstract

For particle collision near rapidly rotating Kerr black holes, the center-of-mass energy can be arbitrarily high if the angular momentum of either of the colliding particles is fine-tuned. Recently, it has been shown that particles which are produced by such a particle collision and escape to infinity cannot be very massive nor very energetic. For electrically charged black holes there is a similar phenomenon, where the center-of-mass energy for the collision of charged particles near the horizon can be arbitrarily high. One might expect that there would exist a similar bound on the energy and mass of particles that are produced by such a particle collision and escape to infinity. In this paper, however, we see that this expectation is not the case. We explicitly show that superheavy and highly energetic charged particles produced by the collision near maximally charged black holes can escape to infinity at least within classical theory if the backreaction and self-force of the particle can be neglected.