Acceleration of particles as a universal property of rotating black holes

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.

show abstract

“…Based on their pioneering discussion, the BSW mechanism has been extensively studied for multifarious black holes [2]- [9].…”

Section: Introductionmentioning

confidence: 99%

Kerr-Sen black hole as accelerator for spinning particles

Peng

Liu

et al. 2018

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…Kerr spin parameter is arbitrarily close to unity and angular momentum of one of the particles takes a specific finetuned value. Various aspects of this process were analyzed by different authors [2][3][4][5][6][7][8][9][10][11][12][13][14]. A similar process in the context of numerous other examples of black holes including Reissner-Nordström black hole [15] was also studied [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 97%

Particle acceleration by Majumdar–Papapetrou di-hole

Patil

Joshi

2014

Gen Relativ Gravit

View full text Add to dashboard Cite

We explore the multi-black hole spacetimes from the perspective of the ultra-high energy particle collisions. Such a discussion is limited to the spacetimes containing a single black hole so far. We deal with the Majumdar-Papapetrou solution representing a system consisting of two identical black holes in the equilibrium. In order to identify the conditions suitable for the process of high energy collisions, we consider particles confined to move on the equatorial plane towards the axis of symmetry with the zero angular momentum. We consider collision between the particles moving in opposite directions at the location midway between the black holes on the axis. We show that the center of mass energy of collision between the particles increases with the decrease in the separation between the black holes and shows divergence in the limit where the separation goes to zero. We estimate the size of the region close to the central point on the equatorial plane where it would be possible to have high energy collisions and show that this region has a reasonably large spatial extent. We further explore the process of high energy collisions with the general geodesics with arbitrary angular momentum on the equatorial plane away from the central point. Although in this paper we deal with the Majumdar-Papapetrou spacetime which serves as a toy example representing multiple black holes, we speculate on the possibility that the ultra-high energy collisions would also occur in the more general setting like colliding black holes, when distance between the black holes is extremely small, which can in principle be verified in the numerical relativity simulations. M. Patil (B)

show abstract

“…Bañados et al [1] and some other authors [2][3][4][5][6][7][8] recently showed that particles falling freely from rest outside a Kerr black hole can collide with arbitrarily high center of mass energy in the limiting case of maximal black hole spin. They proposed that this might lead to signals from ultra high energy collisions, for example of dark matter particles.…”

Section: Introductionmentioning

confidence: 99%

Another Mechanism which Can Prevent Infinite Collision Energy via Black Hole as Particle Accelerators

Ding

Lin

et al. 2012

Int J Theor Phys

View full text Add to dashboard Cite

It has recently been pointed out that infinite center of mass energies for the colliding particles can be attained when the black hole is exactly extremal and only at infinite time and on the horizon of the black hole. In this letter, we show that it cannot occur when the spacetime noncommutative effect is considered, i.e. the quantum effect of gravity is an other preventing mechanism. Additionally, the bigger of the black hole's mass is, the higher of center of mass energy that the particles obtain.

show abstract

Acceleration of particles as a universal property of rotating black holes

Cited by 151 publications

References 9 publications

Kerr-Sen black hole as accelerator for spinning particles

Kerr-Sen black hole as accelerator for spinning particles

Particle acceleration by Majumdar–Papapetrou di-hole

Another Mechanism which Can Prevent Infinite Collision Energy via Black Hole as Particle Accelerators

Contact Info

Product

Resources

About