Publication date: Dec 2013
Abstract:
The particle acceleration mechanism in S2×R1
topology, namely, in the spacetime of the five-dimensional compact black
string, has been studied. The expression of center-of-mass energy of the
colliding neutral particles near static black string has been found. The
collision of a charged particle moving at the innermost stable circular
orbit with a neutral particle coming from infinity has been considered
when black string is immersed in external uniform magnetic field. It has
been shown that the unlimited center-of-mass energy can be approached in
the case of the extremal rotation of the black string which is similar
to the analogous effect in Kerr spacetime. We have also obtained that
the scattering energy of particles in the center-of-mass system can take
arbitrarily large values not only for extremal black string but also for
the nonextremal one. It has been derived that the presence of the extra
dimension can, in principle, increase the upper limit of efficiency of
energy extraction from the extremely rotating black string up to 203%
versus 143% which can be extracted from the extreme Kerr black hole.
Authors:
Tursunov, Arman; Kološ, Martin; Abdujabbarov, Ahmadjon; Ahmedov, Bobomurat; Stuchlík, Zdeněk;