Mandar Patil, Pankaj S. Joshi
We investigate here the particle acceleration and high energy collision in
the Kerr geometry containing a naked singularity. We show that the center of
mass energy of collision between two particles, dropped in from a finite but
arbitrarily large distance along the axis of symmetry is arbitrarily large,
provided the deviation of the angular momentum parameter from the mass is very
small for the Kerr naked singularity. The collisions considered here are
between particles, one of them ingoing and the other one being initially
ingoing but which later emerges as an outgoing particle, after it suffers a
reflection from a spatial region which has a repulsive gravity in the vicinity
of the naked singularity. High energy collisions take place around a region
which marks a transition between the attractive and repulsive regimes of
gravity. We make a critical comparison between our results and the BSW
acceleration mechanism [M. Banados, J. Silk, and S. M. West, Phys. Rev. Lett.
103, 111102 (2009).] for extremal Kerr blackholes, and argue that the scenario
we give here has certain distinct advantages. If compact objects exist in
nature with exterior Kerr superspinning geometry then such high energy
collisions would have a significant impact on the physical processes occurring
in its surrounding and could possibly lead to their own observational
signatures. As an aside we also suggest a curious Gedanken collider physics
experiment which could in principle be constructed in this geometry.
View original:
http://arxiv.org/abs/1103.1083
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