Super-Penrose process for nonextremal black holes

TL;DR

This paper demonstrates that in nonextremal static black holes, particle collisions can produce debris with unbounded energy at infinity, revealing a super-Penrose process unlike in rotating black holes.

Contribution

It shows that the super-Penrose process can occur in nonextremal static black holes, expanding understanding beyond rotating black hole scenarios.

Findings

Super-Penrose process possible in nonextremal black holes

Unbounded energy of debris at infinity demonstrated

External forces enable SPP in Schwarzschild black holes

Abstract

We consider particle collisions in the background of nonextremal spherically symmetric static black holes. It is shown that debris of collision can have indefinitely large energy at infinity, i.e. the super-Penrose process (SPP) can occur. This property is sharply contrasted with that of rotating black holes for which it is already established that the SPP is forbidden. The Reissner-Nordstrom black hole serves as an example. If an external central force exerts on particles, even the Schwarzschild background is suitable for the SPP.