Black Holes and White Holes as Particle Accelerators

TL;DR

This paper explores how particle collisions near black holes and white holes can reach extremely high energies, especially when particles originate near the bifurcation point of the horizon, revealing potential particle acceleration mechanisms.

Contribution

It demonstrates that unbounded collision energy in non-extremal black holes requires particles to originate near the bifurcation point, combining black hole and white hole regions for high-energy collisions.

Findings

Unbounded $E_{cm}$ occurs when particles originate near the bifurcation point.

High-energy collisions are possible close to the outer horizon in Reissner-Nordström black holes.

White hole regions can facilitate particle acceleration to high energies.

Abstract

We investigate particle collisions in non-extremal black hole that can probably induced to extremely high center of mass energy $E_{\text{cm}}$. We consider the collision of two particles where first particle comes from far to the outer horizon of the Reissner-Nordstr\"{o}m black hole and second particle emanates from the white hole region. It is exhibited that unbounded $E_{\text{cm}}$ requires that second particle lapse near the bifurcation point. We discuss the collision of particles close to the outer horizon in detail.