Acceleration of particles by quasiblack holes

Abstract

If two particles collide near the black hole horizon, the energy in the centre of mass (CM) frame can grow indefinitely (the so-called the BSW effect). This requires fine-tuning the parameters (the energy, angular momentum or electric charge) of one particle. We show that the CM energy can be unbound also for collisions in the space-time of quasiblack holes - QBHs (the objects on the threshold of forming the horizon which do not collapse). It does not require special fine-tuning of parameters and occurs when any particle inside a QBH having a finite energy collides with the particle that entered a QBH from the outside region.

8 pages. Final version

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Cited by in corpus (3)

• Ultra-high energy collision with neither black hole nor naked singularity
• Compact objects in general relativity: From Buchdahl stars to quasiblack holes
• Ultra-high-energy head-on collisions without horizons or naked singulrities: general approach