Non-extremal Kerr black holes as particle accelerators

Abstract

It has been shown that extremal Kerr black holes can be used as particle accelerators and arbitrarily high energy may be obtained near the event horizon. We study particle collisions near the event horizon (outer horizon) and Cauchy horizon (inner horizon) of a non-extremal Kerr black hole. Firstly, we provide a general proof showing that particles cannot collide with arbitrarily high energies at the outter horizon. Secondly, we show that ultraenergetic collisions can occur near the inner horizon of a Kerr black hole with any spin parameter $a$.

11 pages, 5 figures. A few minor changes

References in corpus (5)

• Charged Spinning Black Holes as Particle Accelerators
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• Acceleration of colliding shells around a black hole: Validity of the test particle approximation in the Banados-Silk-West process
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• Kerr-Sen Black Hole as Accelerator for Spinning Particles
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• Motion and collision of particles near DST Black holes
• Super-Penrose process for nonextremal black holes
• Is the Kerr black hole a super accelerator?