Eur. Phys. J. C (2020) 80: 31
https://doi.org/10.1140/epjc/s10052-019-7605-7

Regular Article - Theoretical Physics

Maximal efficiency of the collisional Penrose process with spinning particles in Kerr-Sen black hole

Department of Physics, South China University of Technology, Guangzhou, 510641, China

^* e-mail: scxdzhang@scut.edu.cn

Received: 24 November 2019
Accepted: 31 December 2019
Published online: 13 January 2020

Abstract

We study the collision of two uncharged spinning particles around an extreme Kerr-Sen black hole and calculate the maximal efficiency of the energy extraction from the Kerr-Sen black hole via super Penrose process. We consider the collision of two massive particles as well as collision of a massless particle with a massive particle. We calculate the maximum efficiency for all the cases, and found that the efficiency increases as the Kerr-Sen black hole’s parameter () decreases.