标题： 从能层区逃逸的测地线与超高速粒子碰撞遗留物的潜在可观测性 显示英文标题

标题： Unbound geodesics from the ergosphere and potential observability of debris from ultrahigh energy particle collisions

摘要： 黑洞能层区域的粒子碰撞可能会产生极高的质心能量，如果能够逃逸到无限远处，就可能探测到新物理现象。 我们在此表明，一些与赤道平面有高倾角的测地线可能是无界的。 因此，湮灭碎片的有限通量能够逃逸出去，特别是在接近极端克尔黑洞的情况下，并且如果彭罗斯过程起作用的话。 对于一类彭罗斯过程，我们证明了沃德不等式成立，这使得彭罗斯过程能够在高能喷射中起到关键作用。 因此，从一个黑洞加速器以前所未有的高粒子碰撞能量观察到新物理效应的可能性仍然是一种诱人的，尽管是未来的实验愿景。 显示英文摘要

摘要： Particle collisions in black hole ergoregions may result in extremely high center of mass energies that could probe new physics if escape to infinity were possible. Here we show that some geodesics at high inclinations to the equatorial plane may be unbound. Hence a finite flux of annihilation debris is able to escape, especially in the case of near-extremal Kerr black holes and if the Penrose process plays a role. For a class of Penrose processes, we show that the Wald inequalities are satisfied, allowing the Penrose process to have a key role in high energy ejection. Hence the possibility of observing new physics effects from a black hole accelerator at unprecedentedly high particle collision energies remains a tantalizing, if futuristic, experimental vision.