标题： 关于旋转黑洞附近粒子的碰撞 显示英文标题

标题： On the collisions between particles in the vicinity of rotating black holes

摘要： 在旋转黑洞的引力场中粒子的散射被考虑。 显示在质心系中粒子的散射能量不仅可以对于极端黑洞，而且对于非极端黑洞也可以获得非常大的值。 研究了碰撞后的能量提取。 显示由于Penrose过程，逃逸到无限远的粒子的能量可以很大。 在获得高能粒子逃离黑洞的问题中存在的矛盾得到了解决。 显示英文摘要

摘要： 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.