Polarised-boson pairs at the LHC with NLOPS accuracy

TL;DR

This paper develops a NLOPS-accurate simulation framework for inclusive diboson production at the LHC, incorporating polarised weak bosons decaying leptonically, validated against fixed-order calculations and compared with experimental data.

Contribution

It introduces a novel implementation of polarised-boson simulations at NLOPS accuracy within the POWHEG-BOX-RES framework, enabling more precise phenomenological analyses.

Findings

Validated the polarised-boson simulation against fixed-order calculations.

Performed phenomenological analysis with realistic LHC setups.

Compared simulation results with recent ATLAS measurements.

Abstract

We present a calculation of inclusive diboson (WZ, ZZ, WW) processes at the LHC in the presence of intermediate polarised weak bosons decaying leptonically, matching next-to-leading-order accuracy in QCD with parton-shower effects. Starting from recent developments in polarised-boson simulation based on the helicity selection at the amplitude level, we have carried out the implementation in the POWHEG-BOX-RES framework, and validated it against independent fixed-order calculations. A phenomenological analysis in realistic LHC setups, as well as a comparison with recent ATLAS measurements, are presented.