Precise predictions for joint polarisation fractions in WZ production at the LHC

TL;DR

This paper presents the first NNLO QCD + NLO EW accurate predictions for doubly polarized WZ production at the LHC, including uncertainty estimates and application to ATLAS data analysis.

Contribution

It provides the first combined NNLO QCD and NLO EW predictions for doubly polarized WZ production with uncertainty estimates.

Findings

First NNLO QCD + NLO EW accuracy for doubly polarized WZ production.

Uncertainty estimates for missing higher-order corrections.

Application to ATLAS Run-2 data analysis.

Abstract

We achieve for the first time NNLO QCD + NLO EW accuracy for doubly polarised WZ inclusive production at the LHC, in the case of fully leptonic decays. Additionally, we provide estimates for missing higher-order uncertainties in QCD associated with doubly polarised differential cross sections and joint polarisation fractions, obtained both with standard scale variations and with a theory-nuisance-parameter approach. The study is carried out in the fiducial setup of a recent ATLAS analysis of Run-2 data.