Probing lepton gluonic couplings at the LHC

TL;DR

This paper explores how gluonic couplings of leptons, described by dimension-eight operators in an effective Lagrangian, could be observable at the LHC due to high gluon luminosity, despite their usual suppression.

Contribution

It highlights the potential observability of dimension-eight gluonic lepton couplings at the LHC, extending beyond the typical focus on lower-dimension operators.

Findings

Gluonic lepton couplings can be probed at the LHC.

High gluon luminosity enhances sensitivity to these couplings.

Potential to detect new physics near 1 TeV scale.

Abstract

In an effective Lagrangian description of physics beyond the standard model, gluonic couplings of leptons that respect the symmetries of the standard model occur in operators of dimension eight. Normally the effect of such operators is much suppressed in processes that occur at energies below the scale of new physics. For this reason usual studies of the effective Lagrangian are limited to the lowest dimension operators which is typically six. We point out that the large parton luminosity for gluon-gluon interactions at the LHC places these gluonic couplings to leptons within observable reach for a new physics scale near one TeV.