Signatures of gravitational fixed points at the LHC

TL;DR

This paper explores how quantum gravity effects, particularly a gravitational fixed point, could produce detectable signatures at the LHC, especially in theories with extra dimensions and a low Planck scale.

Contribution

It demonstrates that a gravitational fixed point leads to finite cross-sections and assesses the LHC's sensitivity to a fundamental Planck scale up to 6 TeV.

Findings

Relevant cross-sections become finite due to the fixed point.

LHC can probe a fundamental Planck scale up to 6 TeV.

Gravitational signatures could be observable at high energies.

Abstract

We study quantum-gravitational signatures at the Large Hadron Collider (LHC) in the context of theories with extra spatial dimensions and a low fundamental Planck scale in the TeV range. Implications of a gravitational fixed point at high energies are worked out using Wilson's renormalisation group. We find that relevant cross-sections involving virtual gravitons become finite. Based on gravitational lepton pair production we conclude that the LHC is sensitive to a fundamental Planck scale of up to 6 TeV.