Implementation of electroweak corrections in the POWHEG BOX: single W production

TL;DR

This paper introduces a comprehensive implementation of electroweak and QCD radiative corrections for single W boson production within the POWHEG BOX, enabling precise simulations of these processes at the LHC.

Contribution

It provides the first consistent framework combining NLO electroweak and QCD corrections in POWHEG for W production, with validation against existing tools and results.

Findings

Validated the implementation against HORACE and existing results.

Demonstrated the interplay of QCD and electroweak effects at LHC energies.

Showed the framework's extensibility to more complex electroweak processes.

Abstract

We present a fully consistent implementation of electroweak and strong radiative corrections to single W hadroproduction in the POWHEG BOX framework, treating soft and collinear photon emissions on the same ground as coloured parton emissions. This framework can be easily extended to more complex electroweak processes. We describe how next-to-leading order (NLO) electroweak corrections are combined with the NLO QCD calculation, and show how they are interfaced to QCD and QED shower Monte Carlo. The resulting tool fills a gap in the literature and allows to study comprehensively the interplay of QCD and electroweak effects to W production using a single computational framework. Numerical comparisons with the predictions of the electroweak generator HORACE, as well as with existing results on the combination of electroweak and QCD corrections to W production, are shown for the LHC energies, to validate the reliability and accuracy of the approach