Particle collisions in ergoregion of braneworld Kerr black hole

TL;DR

This paper investigates particle motion, energy extraction, and efficiency in the ergoregion of braneworld Kerr black holes, revealing how rotation and brane parameters influence the Penrose process.

Contribution

It provides a detailed analysis of the Penrose process and energy extraction limits specific to braneworld Kerr black holes, extending previous Kerr black hole studies.

Findings

Efficiency increases with black hole rotation.

Brane parameter b affects energy extraction efficiency.

Negative energy states are linked to angular momentum signs.

Abstract

This paper explores the neutral particle motion and collisional Penrose process in ergoregion of the braneworld Kerr black hole. We analyze the properties of event horizon, ergosphere and static limit. The particle collision in ergoregion via the Penrose process is investigated. Furthermore, we study the negative energy states and show that the sign of particle energy can be uniquely determined by the sign of angular momentum. In addition, we study the Wald inequality to determine the limits of energy extraction via the Penrose process and also find lower bound of the irreducible mass. The expression for the efficiency of energy extraction from the brane Kerr black hole is found. Finally, we compare our results with that obtained from the Kerr black hole. It is concluded that efficiency increases with the increase of rotation as well as brane parameter b of the black hole.