Associated production of a Kaluza-Klein excitation of a gluon with a t t(bar) pair at the LHC

TL;DR

This paper investigates the potential to detect Kaluza-Klein gluon excitations in Randall-Sundrum models at the LHC by analyzing their associated production with top quark pairs, focusing on a mass range of 2.8 to 2.9 TeV.

Contribution

It proposes and analyzes a novel production mechanism for KK gluons at the LHC, specifically their associated production with top quark pairs, which is significant due to the absence of certain couplings.

Findings

LHC can probe KK gluon masses of 2.8-2.9 TeV via this process.

Associated production provides a viable detection channel for KK gluons.

Enhanced couplings to right-handed quarks are crucial for this mechanism.

Abstract

In Randall-Sundrum models, the Kaluza-Klein (KK) excitations of the gluon, g_{KK} have enhanced couplings to the right-handed quarks. In the absence of a gg g_{KK} coupling in these models, the single production of a g_{KK} from an initial gg state is not possible. The search for other production mechanisms at the LHC, therefore, becomes important. We suggest that the associated production of a g_{KK} with a t t(bar) pair is such a mechanism. Our study shows that through this process the LHC can probe KK gluon masses in the range of 2.8 -- 2.9 TeV.