Charged spinning black holes as accelerators of spinning particles

TL;DR

This paper investigates how Kerr-Newman black holes can accelerate spinning particles to high energies, extending previous work on non-spinning particles and analyzing the effects of black hole and particle properties.

Contribution

It extends the analysis of particle acceleration to spinning particles in Kerr-Newman black hole backgrounds, deriving center-of-mass energy and exploring parameter effects.

Findings

Center-of-mass energy depends on black hole and particle properties.

Numerical results show conditions for high-energy collisions.

Spinning particles can achieve significant acceleration near Kerr-Newman black holes.

Abstract

It is well known that some black holes can act as accelerators for particles without spin. Recently, there are some works considering collision of two spinning particles in the background of Schwarzschild and Kerr black holes and it was shown that {the center-of-mass energy of the test particles is related to the spin}. In this paper we extend the results to some more general cases. We consider Kerr-Newman black holes as accelerators for spinning particles. We derive the center-of-mass energy of the spinning particles and use numerical method to investigate how the center-of-mass energy is affected by the properties of the black holes and spinning particles.