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.

arXiv commentLatex,17 pages,1 figure,minor revision,accepted by PRD

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• Properties of the Innermost Stable Circular Orbit of a spinning particle moving in a rotating Maxwell-dilaton black hole background
• Constraints on Einstein-Maxwell dilaton-axion gravity from X-ray reflection spectroscopy
• Signatures of Einstein-Maxwell dilaton-axion gravity from the observed jet power and the radiative efficiency
• Implications of Einstein-Maxwell dilaton-axion gravity from the black hole continuum spectrum
• 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
• Escape probability of particle from Kerr-Sen black hole
• Charged scalar fields in a Kerr-Sen black hole: exact solutions, Hawking radiation, and resonant frequencies
• Schwarzschild black hole surrounded by quintessential matter field as an accelerator for spinning particles
• Pair production of scalars around near-extremal Kerr-Sen black holes
• Signatures of Einstein-Maxwell dilaton-axion gravity from the observed quasi-periodic oscillations in black holes
• Collisional Penrose process of BTZ black holes
• Motion of Spinning Particles around Black Holes
• The effect of the WGC condition on the maximal energy extracted from black holes
• Deciphering signatures of Kerr-Sen black holes in presence of plasma from the Event Horizon Telescope data
• Acceleration of particles in Schwarzschild and Kerr geometries
• Naked Singularity as Accelerator for Spinning Particle