Comment on "Kerr Black Holes as Particle Accelerators to Arbitrarily High Energy"

TL;DR

This paper critically examines the feasibility of Kerr black holes acting as particle accelerators with arbitrarily high energies, highlighting astrophysical and physical limitations that constrain such phenomena.

Contribution

It provides a critical analysis of the theoretical possibility versus astrophysical constraints on high-energy collisions near Kerr black holes.

Findings

Astrophysical limitations restrict black hole spin.

Back-reaction effects limit collision energies.

Initial conditions influence collision likelihood.

Abstract

It has been suggested that rotating black holes could serve as particle colliders with arbitrarily high center-of-mass energy. Astrophysical limitations on the maximal spin, back-reaction effects and sensitivity to the initial conditions impose severe limits on the likelihood of such collisions.