Z boson pair production at the LHC to ${\cal O}(\alpha_s)$ in TeV scale gravity models

TL;DR

This paper presents next-to-leading order QCD corrections to Z boson pair production at the LHC within large extra dimension models, highlighting significant impacts on observables and reduced theoretical uncertainties.

Contribution

It provides the first NLO QCD calculations for Z boson pair production in large extra dimension models at the LHC.

Findings

QCD corrections significantly affect kinematic distributions

Inclusion of ${ m O}(\a_s)$ reduces factorization scale uncertainty

Results improve theoretical predictions for Z boson pair production

Abstract

The first results on next-to-leading order QCD corrections to the production of two Z bosons, in hadronic collisions in the large extra dimension ADD model are presented. Various kinematical distributions are obtained to order $\alpha_s$ in QCD by taking into account all the parton level subprocesses. We estimate the impact of the QCD corrections on various observables and find that they are significant. We also show the reduction in factorisation scale uncertainity when ${\cal O}(\alpha_s)$ effects are included.