Visible borders of spacetime generated by high-energy collisions

TL;DR

This paper discusses the theoretical possibility of creating visible borders of spacetime, a new concept extending singularities, through high-energy collisions such as those at the LHC, which could reveal new physics in strongly curved spacetime.

Contribution

It introduces the idea of visible borders of spacetime as a generalization of singularities and shows they could be produced at colliders if quantum gravity is accessible at TeV scales.

Findings

Visible borders can form at high-energy collisions.

Such borders could be observable and provide insights into quantum gravity.

Formation depends on the energy scale of quantum gravity.

Abstract

Several years ago, two of the present authors proposed the concept of the border of spacetime as a generalization of spacetime singularities. Visible borders of spacetime, which replace naked singularities of classical theory, are not only necessary for the mathematical completeness of general relativity but they also provide a window into new physics of strongly curved spacetime, which is observable in principle. By employing simple geometrical and dimensional arguments, we show that not only black holes but also visible borders of spacetime will be generated at, for example, the CERN Large Hadron Collider, provided that the energy scale of quantum gravity is near 1 TeV in the framework of the large extra-dimension scenario.