Next-to-leading order QCD predictions for graviton and photon associated production in the Large Extra Dimensions model at the LHC

TL;DR

This paper calculates the complete next-to-leading order QCD corrections for graviton and photon associated production in the large extra dimensions model at the LHC, improving accuracy and reducing theoretical uncertainties.

Contribution

It provides the first comprehensive NLO QCD predictions for the $pp o ext{photon} + G_{KK}$ process in the LED model, including differential distributions.

Findings

NLO corrections generally increase total cross sections.

NLO corrections reduce dependence on factorization and renormalization scales.

Jet veto effects decrease the total cross sections at NLO.

Abstract

We present the calculations of the complete next-to-leading order(NLO) QCD corrections to the inclusive total cross sections for the Kaluza-Klein(KK) graviton and photon associated production process $pp \to \gamma G_{KK} + X$ in the large extra dimensions(LED) model at the LHC. We show that the NLO QCD corrections in general enhance the total cross sections and reduce the dependence of the total cross sections on the factorization and renormalization scales. When jet veto is considered, the NLO corrections reduce the total cross sections. We also calculate some important differential cross sections for this process at NLO: the missing transverse momentum distribution, the transverse momentum distribution and the pseudorapidity distribution of photon.