论文标题
Bañados-Silk-West效果的特殊情况
Special case of the Bañados-Silk-West effect
论文作者
论文摘要
如果两个颗粒在旋转的极端黑洞附近碰撞，其中一个是微调的，则质量框架中心的能量$ e_ {c.m。} $可以无限制地生长。这是所谓的Bañados-Silk-West（BSW）效应。最近，考虑了另一种高能量碰撞，其中所有过程都在施瓦茨柴尔德背景中具有自由下降的颗粒。如果粒子之一的杀伤能量$ e $很小，则$ e_ {c.m。} $生长无限。但是，我们表明，这种粒子不能与有限能量，角动量和质量的任何先例碰撞中产生。因此，与标准BSW效应相反，如果初始粒子从无穷大落下，则无法实现这一效果。如果黑洞是电动带电的，则确实可以进行这种类型的碰撞，而一个非常小的$ e $的粒子碰撞而另一个来自无穷大的粒子。因此，由于带电黑洞的背景中中性颗粒的碰撞，实现了BSW效应。但是，这需要至少两个步骤。
If two particles collide near the rotating extremal black hole and one of them is fine-tuned, the energy in the center of mass frame $E_{c.m.}$ can grow unbounded. This is the so-called Bañados-Silk-West (BSW) effect. Recently, another type of high energy collisions was considered in which all processes happen in the Schwarzschild background with free falling particles. If the Killing energy $E$ of one of particle is sufficiently small, $E_{c.m.}$ grows unbounded. We show that, however, such a particle cannot be created in any precedent collision with finite energies, angular momenta and masses. Therefore, in contrast to the standard BSW effect, this one cannot be realized if initial particles fall from infinity. If the black hole is electrically charged, such a type of collisions is indeed possible, when a particle with very small $E$ collides with one more particle coming from infinity. Thus the BSW effect is achieved due to collisions of neutral particles in the background of a charged black hole. This requires, however, at least two-step process.
