NLO QCD corrections to the processes pp $\rightarrow $ ZZ with 0, 1 and 2 jets at the LHC

TL;DR

This paper implements and calculates NLO QCD corrections for ZZ, ZZj, and ZZjj production processes at the LHC, providing detailed cross sections, uncertainties, and kinematic distributions with realistic detector simulation.

Contribution

It introduces a new implementation of ZZ production processes at NLO in MadGraph5_aMC@NLO, including jet contributions and gluon fusion, with comprehensive phenomenological predictions.

Findings

Calculated total cross sections with QCD corrections.

Estimated theoretical uncertainties for each process.

Analyzed kinematic distributions at partonic and hadronic levels.

Abstract

We propose an implementation of ZZ, ZZj and ZZjj productions in MadGraph5_aMC@NLO framework at $\sqrt{s}$ = 14 TeV. We calculate these processes at leading order and next-to-leading order with QCD corrections and we present a theoretical prediction of their total cross sections with different cuts in transverse momentum of jets, including gluon fusion contributions. In the same time we estimate their theoretical uncertainty. We discuss the various kinematical distributions spectrums at partonic level and hadronic level applying the showering and hadronization using Pythia8. In order to reconstruct the events similar to that found at LHC, we use the ATLAS cards and the fast detector simulation Delphes.