Kerr black holes as accelerators of spinning test particles

Guo, Minyong; Gao, Sijie

doi:10.1103/physrevd.93.084025

Cited by 43 publications

(51 citation statements)

References 17 publications

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“…In order to simplify the calculation in the main text and easy to gain the physical insight, people usually working in a specific frame which only 3-components of the spin tensor is nonzero [9]. This add to the spin supplementary condition [9,10] S ab P b = 0 (2.5) or equivalently set S 0i = 0. Again for latter convenience, we normalize the parameter τ in Eq.…”

Section: )mentioning

confidence: 99%

Kerr–de Sitter and Kerr–anti–de Sitter black holes as accelerators for spinning particles

2019

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It is shown that the Kerr black hole could act as accelerators for spinning particles. In principle, it could obtain arbitrarily high energy for extremal Kerr black hole. In this paper, we extend the previous research to the Kerr-(anti-)de Sitter background and find that the cosmological constant plays an important role in the result. For the case of Kerr-anti-de Sitter black holes, like the Kerr background, only the extremal Kerr-anti-de Sitter black holes can have a divergent centerof-mass energy of collision. While, for the case of Kerr-de Sitter black holes, the collision of two spinning particles can take place on the outer horizon of the black holes and the center-of-mass energy of collision can blow up if one of the collision particle takes the critical angular momentum. Hence, non-extremal Kerr-de Sitter black holes could also act as accelerators with arbitrarily high center-of-mass energy for spinning particles.

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Section: )mentioning

confidence: 99%

Kerr–de Sitter and Kerr–anti–de Sitter black holes as accelerators for spinning particles

2019

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“…For the convenience of following discussion, we define 20) thus u a u a = −1. Furthermore, we consider the case when the motion of the particle was confined on the equatorial plane θ = π 2 , which means u (2) = 0.…”

Section: )mentioning

confidence: 99%

“…To describe the movement of spinning particles, we will employ the Mathisson-PapapetrouDixon equation [11,20]…”

Section: Motion Of Spinning Particle In Kerr-sen Black Hole Backgroundmentioning

confidence: 99%

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Kerr-Sen black hole as accelerator for spinning particles

Peng

Liu

et al. 2018

Phys. Rev. D

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It has been proved that arbitrarily high-energy collision between two particles can occur near the horizon of an extremal Kerr black hole as long as the energy E and angular momentum L of one particle satisfies a critical relation, which is called the BSW mechanism.Previous researchers mainly concentrate on geodesic motion of particles. In this paper, we will take spinning particle which won't move along a timelike geodesic into our consideration, hence, another parameter s describing the particle's spin angular momentum was introduced. By employing the Mathisson-Papapetrou-Dixon equation describing the movement of spinning particle, we will explore whether a Kerr-Sen black hole which is slightly different from Kerr black hole can be used to accelerate a spinning particle to arbitrarily high energy. We found that when one of the two colliding particles satisfies a critical relation between the energy E and the total angular momentum J, or has a critical spinning angular momentum s c , a divergence of the center-of-mass energy E cm will be obtained.

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“…The collisions of spinning particles on rotating black holes in Ref. [26,27], and on Schwarzschild black holes was considered in Ref. [28]; however, the unavoidable appearance of superluminal motion and the change of trajectories from timelike to spacelike can be avoided due to the energy in the CM frame can grow unbounded provided that one of the particles is not exactly critical but slightly deviates from the critical trajectory [29].…”

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confidence: 99%

Particle collisions near a three-dimensional warped AdS black hole

2018

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In this paper we consider the warped AdS3 black hole solution of topologically massive gravity with a negative cosmological constant, and we investigate the possibility that it acts as a particle accelerator by analyzing the energy in the center of mass (CM) frame of two colliding particles in the vicinity of its horizon, which is known as the Bañados, Silk and West (BSW) process. Mainly, we show that the critical angular momentum (Lc) of the particle decreases when the parameter that controls the stretching deformation (ν) increases. Also, we show that despite the particle with Lc can exist for certain values of the conserved energy outside the horizon, it will never reach the event horizon; therefore, the black hole can not act as a particle accelerator with arbitrarily high CM energy on the event horizon. However, such particle could also exist inside the outer horizon being the BSW process possible on the inner horizon. On the other hand, for the extremal warped AdS3 black hole, the particle with Lc and energy E could exist outside the event horizon and the CM energy blows up on the event horizon if its conserved energy fulfill the condition E 2 > (ν 2 +3)l 2 3(ν 2 −1) , being the BSW process possible. * rbecar@uct.cl † pablo.gonzalez@udp.cl ‡ yvasquez@userena.cl 2 CONTENTS

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Kerr black holes as accelerators of spinning test particles

Cited by 43 publications

References 17 publications

Kerr–de Sitter and Kerr–anti–de Sitter black holes as accelerators for spinning particles

Kerr–de Sitter and Kerr–anti–de Sitter black holes as accelerators for spinning particles

Kerr-Sen black hole as accelerator for spinning particles

Particle collisions near a three-dimensional warped AdS black hole

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