Automated computations of electroweak corrections using Sherpa+Recola

TL;DR

This paper presents the integration of Recola into Sherpa, enabling automated and systematic calculations of electroweak corrections at NLO accuracy within a versatile Monte Carlo framework for LHC processes.

Contribution

The novel implementation combines Recola with Sherpa, allowing automated NLO electroweak and QCD computations for any Standard Model process.

Findings

Enables automated electroweak corrections in Sherpa

Supports fixed-order NLO QCD and EW calculations

Maintains Sherpa functionalities like parton shower and hadronisation

Abstract

Given the experimental precision and the multitude of processes that can be measured at the LHC, electroweak (EW) corrections become more and more relevant. This calls for the automatisation of EW corrections and in particular their implementations in multi-purpose Monte Carlo generators in order to allow for a systematic study of such contributions. In these proceedings I present the implementation of the matrix-element generator Recola in the Sherpa Monte Carlo. The combination Sherpa+Recola allows to compute, in principle, any process in the Standard Model at NLO QCD and EW accuracy. In addition to fixed-order NLO computations, all functionalities of Sherpa such as parton shower or hadronisation are still available.