High energy collision of particles in the magnetic field far from black holes

Abstract

We consider collision of two particles in the axially symmetric black hole metric in the magnetic field. If the value of the angular momentum |L| of one particles grows unbound (but its Killing energy remains fixed) one can achieve unbound energy in the center of mass frame E_{c.m.} In the absence of the magnetic field, collision of this kind is known to happen in the ergoregion. However, if the magnetic field strength B is also large, with the ratio |L|/B being finite, large E_{c.m.} can be achieved even far from a black hole, in the almost flat region. Such an effect also occurs in the metric of a rotating star.

9 pages. Misleading restriction qB>0 removed, conclusion slightly expanded

References in corpus (2)

• On the energy of particle collisions in the ergosphere of the rotating black holes
• Ultrahigh energy particle collisions near the black hole horizon in the strong magnetic field