Particle Acceleration on the Background of the Kerr-Taub-NUT Spacetime

TL;DR

This paper investigates particle collisions in Kerr-Taub-NUT spacetime, revealing that the center-of-mass energy depends on both rotation and NUT charge, with potential for unlimited energy in extremal cases.

Contribution

It extends the analysis of particle acceleration to Kerr-Taub-NUT spacetime, highlighting the influence of NUT charge on collision energy limits.

Findings

CM energy depends on rotation parameter and NUT charge.

Unlimited CM energy can be approached in extremal Kerr-Taub-NUT spacetime.

Range of rotation parameter for unlimited energy differs from Kerr black holes.

Abstract

We study the collision of two particles with the different rest masses moving in the equatorial plane of a Kerr-Taub-NUT spacetime and get the center-of-mass (CM) energy for the particles. We find that the CM energy depends not only on the rotation parameter, $a$, but also on the NUT charge of the Kerr-Taub-NUT spacetime, $n$. Especially, for the extremal Kerr-Taub-NUT spacetime, an unlimited CM energy can be approached if the parameter $a$ is in the range $[1,\sqrt{2}]$, which is different from that of the Kerr and Kerr-Newman black holes.