Ultra-high energy collisions in static space-times: single versus multi-black hole cases
Abstract
We consider collision of two particles near static electrically charged extremal black holes and elucidate the conditions under which the energy in the centre of mass frame E_{c.m.} grows unbounded. For a single black hole, we generalize the results obtained earlier for the Reissner-Nordstr\"om metric, to distorted black holes. In the multi-black hole space-time, qualitatively new features appear. If the point of collision is close to at least two horizons simultaneously, unbounded E_{c.m.} are possible (i) without fine-tuning of particles' parameters, (ii) for an arbitrary mutual orientation of two velocities. Such a combination of properties (i) and (ii) has no analogues in the single black hole case and facilitates the condition of getting unbounded E_{c.m.}. Collisions in the electro-vacuum Majumdar-Papapetrou metric (several extremal black holes in equilibrium) is analyzed explicitly.
Keywords
Cite
@article{arxiv.1412.4250,
title = {Ultra-high energy collisions in static space-times: single versus multi-black hole cases},
author = {O. B. Zaslavskii},
journal= {arXiv preprint arXiv:1412.4250},
year = {2015}
}
Comments
18 pages. Essentially expanded, presentation improved. To appear in GRG