Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2011-03-20
Phys.Rev.D84:043006,2011
Physics
High Energy Physics
High Energy Physics - Theory
23 pages, no figures, revised version accepted for publication in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.84.043006
We study the possibility of getting infinite energy in the center of mass frame of colliding charged particles in a general stationary charged black hole. For black holes with two-fold degenerate horizon, it is found that arbitrary high center-of-mass energy can be attained, provided that one of the particle has critical angular momentum or critical charge, and the remained parameters of particles and black holes satisfy certain restriction. For black holes with multiple-fold degenerate event horizons, the restriction is released. For non-degenerate black holes, the ultra-high center-of-mass is possible to be reached by invoking the multiple scattering mechanism. We obtain a condition for the existence of innermost stable circular orbit with critical angular momentum or charge on any-fold degenerate horizons, which is essential to get ultra-high center-of-mass energy without fine-tuning problem. We also discuss the proper time spending by the particle to reach the horizon and the duality between frame dragging effect and electromagnetic interaction. Some of these general results are applied to braneworld small black holes.
Jiang Ying
Liu Yu-Xiao
Wu Shao-Feng
Zhu Yi
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