Publication date: May 2014
Abstract:
We demonstrate that ultra-high-energy collisions of particles falling
freely from rest at infinity can occur in the field of near-extreme
Kehagias-Sfetsos naked singularities related to the Hořava
gravity. However, the efficiency of escaping of created
ultrarelativistic particles and the energy efficiency of the collisional
process relative to distant observers are significantly lowered due to
large gravitational redshift, which is substantially lower in comparison
to those related to the collisions occurring close to the equatorial
plane of near-extreme Kerr naked-singularity spacetimes. In the
Kehagias-Sfetsos naked-singularity spacetimes, the energy efficiency
relative to distant observers corresponds to the covariant energy of the
colliding particles only. Finally, we demonstrate how the
ultra-high-energy collisions are modified for charged particles if the
Kehagias-Sfetsos naked singularities are immersed in a uniform magnetic
field.
Authors:
Stuchlík, Zdeněk; Schee, Jan; Abdujabbarov, Ahmadjon;