Resonance-improved parton-shower matching for the Drell-Yan process including electroweak corrections

TL;DR

This paper enhances the accuracy of Drell-Yan process simulations at the LHC by improving parton-shower matching with resonance treatment and electroweak corrections using the POWHEG method.

Contribution

It introduces an improved resonance treatment within the POWHEG method and provides an independent implementation with comparisons to existing results.

Findings

Enhanced resonance treatment improves simulation accuracy.

Validation against previous POWHEGBOX results confirms consistency.

Provides formalism for photon radiation with mass regularization.

Abstract

We use the POWHEG method to perform parton-shower matching for Drell-Yan production of W and Z bosons at the LHC at NLO QCD and NLO electroweak accuracy. In particular, we investigate an improved treatment of the vector-boson resonances within the POWHEG method. We employ an independent implementation of the POWHEG method and compare to earlier results within the POWHEGBOX. On the technical side, we provide the FKS formalism for photon-radiation off fermions within mass regularization.