LHC sensitivity to Kalzua-Klein gluon in two b-jets decay channel

TL;DR

This paper explores the potential for the Large Hadron Collider to detect a Kaluza-Klein gluon via its decay into b-quark pairs within a warped extra dimension model, identifying parameter regions with high discovery significance.

Contribution

It demonstrates the LHC's sensitivity to KK gluons in the b-jet decay channel and maps the parameter space for potential discovery at specific luminosities.

Findings

Significance > 5σ achievable with 10 fb^{-1} luminosity.

Parameter space identified for potential KK gluon discovery.

Enhanced detection prospects due to third-generation quark coupling.

Abstract

We examine a possibility to discover a Kaluza-Klein (KK) excitation of gluon in a warped extra dimension model at the Large Hadron Collider focusing on a decay channel of the KK gluon into a $b$-quark pair. It is known that, in a certain extension of the warped extra dimension model, the third generation quarks could strongly couple to the KK gluon owing to appropriate bulk fermion mass parameters. Taking account of kinematical cuts to reduce background events, we show the model parameter space which leads to a significance larger than 5$\sigma$ with the integrated luminosity of 10 (100) ${\rm fb}^{-1}$.