Deflection of charged massive particles by a four-dimensional charged Einstein-Gauss-Bonnet black hole

Zonghai Li; Yujie Duan; Junji Jia

doi:10.1088/1361-6382/ac38d0

paper

Deflection of charged massive particles by a four-dimensional charged Einstein-Gauss-Bonnet black hole

arXiv:2012.14226 · doi:10.1088/1361-6382/ac38d0

Abstract

Based on the Jacobi metric method, this paper studies the deflection of a charged massive particle by a novel four-dimensional charged Einstein-Gauss-Bonnet black hole. We focus on the weak field approximation and consider the deflection angle with finite distance effects. To this end, we use a geometric and topological method, which is to apply the Gauss-Bonnet theorem to the Jacobi space to calculate the deflection angle. We find that the deflection angle contains a pure gravitational contribution $δ_{g}$ , a pure electrostatic $δ_{c}$ and a gravitational-electrostatic coupling term $δ_{g c}$ . We also show that the electrostatic contribution $δ_{c}$ can also be computed by the Jacobi metric method using the GB theorem to a charge in a Minkowski flat spacetime background. We find that the deflection angle increases(decreases) if the Gauss-Bonnet coupling constant $α$ is negative(positive). Furthermore, the effects of the BH charge, the particle charge-to-mass ratio and the particle velocity on the deflection angle are analyzed.

arXiv comment11 pages, figures updated and language polished;

Deflection of charged massive particles by a four-dimensional charged Einstein-Gauss-Bonnet black hole

Abstract

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