Rotation as an origin of high energy particle collisions

TL;DR

This paper investigates how high-energy particle collisions can occur in rotating spacetimes without horizons, particularly within ergoregions, and demonstrates that the collision energy can be arbitrarily large under certain conditions, independent of specific models.

Contribution

It shows that high-energy collisions are possible in ergoregions of rotating spacetimes without horizons, regardless of the specific model, including relativistic stars and wormholes.

Findings

Collision energy can be arbitrarily high in ergoregions.

High-energy collisions are model-independent.

Applicable to both relativistic stars and wormholes.

Abstract

We consider collision of two particles in rotating spacetimes without horizons. If the metric coefficient responsible for rotation of spacetime is big enough, the energy of collisions in the centre of mass frame can be as large as one likes. This can happen in the ergoregion only. The results are model-independent and apply both to relativistic stars and wormholes.