NLO EW and QCD corrections to polarised same-sign WW scattering at the LHC

TL;DR

This paper provides the first comprehensive NLO electroweak and QCD corrected predictions for polarised same-sign WW scattering at the LHC, including detailed polarisation modeling and off-shell effects, aiding future experimental analyses.

Contribution

It introduces a novel calculation framework for fully leptonic same-sign WW scattering with polarisation and radiative corrections at NLO EW+QCD accuracy.

Findings

First fully leptonic NLO EW+QCD predictions for WW scattering

Analysis of polarisation states and off-shell effects

Differential observables to discriminate polarisation states

Abstract

We present the first calculation of same-sign WW scattering at the LHC in the fully leptonic decay channel including the modelling of polarisation for intermediate electroweak bosons and radiative corrections up to NLO EW+QCD accuracy. The predictions rely on a pole expansion and on the split of polarisation states at matrix-element level. Doubly-polarised and unpolarised signals are investigated together with full off-shell results. A detailed phenomenlogical analysis is carried out focusing on differential observables that discriminate between polarisation states, paving the way for refined polarisation-oriented analyses of vector-boson scattering with Run-3 LHC data.