Abstract:
Recently, a generalised solution for Einstein equations for a rotating black hole,
surrounded by matter field was proposed, which is the Kerr–Newman spacetime
with an anisotropic matter [Phys. Rev. D. 101 064067]. Due to the negative
radial pressure of the anisotropic matter, the solution possesses an additional
hair along with the conventional mass, charge and spin. In this article we show
that, this new class of black holes can act as a cosmic particle accelerator during
the collision of two generic particles in its gravitational field in the ergo-region.
The centre of mass energy of the particles shoots to an arbitrary high value
in the vicinity of the event horizon for the extremal black hole. The physical
conditions for the collision to take place are obtained by studying the horizon
structure and circular particle motion. The results obtained are interesting from
an astrophysical perspective.
