NLO QCD+NLO EW corrections to diboson production matched to parton shower

TL;DR

This paper develops a method to accurately simulate diboson production at the LHC by combining NLO QCD and NLO EW corrections with parton showers, including detailed effects like spin correlations and off-shell contributions.

Contribution

It introduces the first consistent matching of NLO QCD and NLO EW corrections to parton showers for diboson production, using an interface between Recola2-Collier and POWHEG-BOX-RES.

Findings

Validated the implementation at fixed order

Achieved matched results with parton shower

Provided a new interface for future simulations

Abstract

We present the matching of NLO QCD and NLO EW corrections to parton showers for vector-boson pair production at the LHC. We consider leptonic final states, including resonant and non-resonant diagrams, spin correlations and off-shell effects. Our results are obtained interfacing the Recola2-Collier one-loop provider with the POWHEG-BOX-RES framework. We discuss our implementation, we validate it at fixed order, and we show our final results matched to parton shower. A by-product of our work is also a general interface between Recola2-Collier and POWHEG-BOX-RES. This is the first time that EW and QCD corrections to diboson production are consistently matched to parton showers.