On particles collisions in the vicinity of rotating black holes
A. A. Grib, Yu. V. Pavlov* 1)
+Theoretical Physics and Astronomy Department, The Herzen University, 191186 St. Petersburg, Russia
*Institute of Problems in Mechanical Engineering, RAS, 199178 St. Petersburg, Russia
Scattering of particles in the gravitational field of
rotating black holes is considered.
It is shown that scattering energy of particles in the centre of mass
system can obtain very large values not only for extremal black
holes but also for nonextremal ones.
Extraction of energy after the collision is investigated.
It is shown that due to the Penrose process the energy of the particle
escaping the hole at infinity can be large.
Contradictions in the problem of getting high energetic particles
escaping the black hole are resolved.