Gluon-initiated production of a Kaluza-Klein gluon in a Bulk Randall-Sundrum model

TL;DR

This paper investigates the production of Kaluza-Klein gluons in a Bulk Randall-Sundrum model at hadron colliders, showing that gluon-initiated processes at NLO are negligible compared to quark-antiquark initial states.

Contribution

It provides the first NLO QCD analysis of gluon-initiated KK-gluon production, revealing its minimal impact on collider search strategies.

Findings

NLO gluon-initiated KK-gluon production is very small.

Leading order dominates KK-gluon production at colliders.

NLO corrections do not significantly alter search prospects.

Abstract

In the Bulk Randall-Sundrum model, the Kaluza-Klein excitations of the gauge bosons are the primary signatures. In particular, the search for the Kaluza-Klein (KK) excitation of the gluon at hadron colliders is of great importance in testing this model. At the leading order in QCD, the production of this KK-gluon proceeds only via q qbar-initial states. We study the production of KK-gluons from gluon initial states at next-to-leading order in QCD. We find that, even after including the sub-dominant KK-gluon loops at this order, the next-to-leading order (NLO) cross-section is tiny compared to the leading order cross-section and unlikely to impact the searches for this resonance at hardon colliders.