Production of a KK-graviton in association with a boson via gluon fusion at the LHC

TL;DR

This paper investigates the production of Kaluza-Klein gravitons alongside bosons via gluon fusion at the LHC, analyzing the processes' theoretical aspects and potential observability in collider experiments.

Contribution

It provides a detailed calculation of KK-graviton production processes with bosons at one-loop level, highlighting the vanishing of certain channels and their experimental implications.

Findings

The process $gg o ext{photon} ext{G}$ has zero cross-section at one-loop.

Processes $gg o h G$ and $Z G$ are potentially observable at the LHC.

Theoretical analysis of KK-graviton production mechanisms in extra-dimensional models.

Abstract

We discuss the processes where a KK-graviton ($G$) of the extra-dimensional models is produced in association with a color singlet boson via gluon fusion at the LHC. In particular, we consider the processes $gg \to h G$, $\gamma G$, $Z G$. These processes occur at one-loop through box and triangle diagrams. The cross-section for the process $gg \to \gamma G$ vanishes at the one-loop level. It can be understood by introducing the charge conjugation transformations of the KK-graviton. The processes $gg \to h G$, $Z G$ can be observed at the LHC if the KK-graviton and the Higgs boson exist with appropriate properties.