Rotating Black Hole with an Anisotropic Matter Field as a Particle Accelerator

TL;DR

This paper demonstrates that a newly proposed rotating black hole solution with anisotropic matter can serve as a particle accelerator, achieving arbitrarily high collision energies near the event horizon, with implications for astrophysics.

Contribution

It introduces a novel black hole solution with anisotropic matter and shows its potential as a high-energy particle accelerator during particle collisions.

Findings

Collision energy diverges near extremal horizon

Horizon structure influences collision conditions

Black hole acts as a natural particle accelerator

Abstract

Recently, a generalised solution for Einstein equations of a rotating compact body, surrounded by matter field was proposed, which is the Kerr-Newman spacetime with an anisotropic matter. The solution possesses an additional hair, along with the conventional mass, charge and spin, which arises from the negative radial pressure of the anisotropic matter. In this article we show that, this new class of black holes can act as a particle accelerator during the collision of two generic particles in its gravitational field in the ergo-region. The centre of mass energy of the particles shoots to arbitrary high value in the vicinity of event horizon for the extremal black hole. The physical conditions for the collision to take place are obtained by studying the horizon structure and circular particle motion. The results are interesting from astrophysical perspective.