Kerr-Sen Black Hole as Accelerator for Spinning Particles

Abstract

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.

Latex,17 pages,1 figure,minor revision,accepted by PRD

References in corpus (8)

• Charged Spinning Black Holes as Particle Accelerators
• Collision of two general geodesic particles around a Kerr black hole
• Acceleration of particles by black holes -- general explanation
• Acceleration of colliding shells around a black hole: Validity of the test particle approximation in the Banados-Silk-West process
• Particle Collisions on Stringy Black Hole Background
• Charged spinning black holes as accelerators of spinning particles
• Relativistic effects due to gravimagnetic moment of a rotating body
• Upper bound on the center-of-mass energy of the collisional Penrose process

Cited by in corpus (10)

• Can the dynamics of test particles around charged stringy black holes mimic the spin of Kerr black holes?
• Observational signature of a near-extremal Kerr-Sen black hole in the heterotic string theory
• Properties of the Innermost Stable Circular Orbit of a spinning particle moving in a rotating Maxwell-dilaton black hole background
• Motion of a spinning particle around an improved rotating black hole
• Maximal efficiency of the collisional Penrose process with spinning particles in Kerr-Sen black hole
• Universality of BSW mechanism for spinning particles
• Schwarzschild black hole surrounded by quintessential matter field as an accelerator for spinning particles
• Motion of Spinning Particles around Black Holes
• Acceleration of particles in Schwarzschild and Kerr geometries
• Naked Singularity as Accelerator for Spinning Particle