Acceleration of particles by nonrotating charged black holes

TL;DR

This paper demonstrates that nonrotating charged black holes can also accelerate particles to extremely high energies, similar to rotating black holes, by analyzing radial particle motion in the Reissner-Nordström background.

Contribution

It shows that the particle acceleration effect previously associated with rotating black holes also occurs in nonrotating charged black holes, expanding understanding of black hole particle acceleration mechanisms.

Findings

High-energy particle collisions near charged black holes

Existence of infinite energy in center-of-mass frame for nonrotating charged black holes

Parallel features between rotating and charged black hole acceleration effects

Abstract

Recently, in the series of works a new effect of acceleration of particles by black holes was found. Under certain conditions, the energy in the centre of mass frame can become infinitely large. The essential ingredient of such effect is the rotation of a black hole. In the present Letter, we argue that the similar effect exists for a nonrotating but charged black hole even for the simplest case of radial motion of particles in the Reissner-Nordstr\"om background. All main features of the effect under discussion due to rotating black holes have their counterpart for the nonrotating charged ones.