Evaluation of the Theoretical Uncertainties in the W to Lepton and Neutrino Cross Sections at the LHC

TL;DR

This paper assesses the theoretical uncertainties affecting the measurement of W boson production cross-sections at the LHC, focusing on QCD, electroweak effects, and simulation methods.

Contribution

It provides a comprehensive analysis of systematic errors, including higher-order corrections and recommendations for simulation tools to improve accuracy.

Findings

Quantifies uncertainties from NNLO QCD effects

Evaluates impact of missing NLO electroweak corrections

Suggests optimal MC generators for event simulation

Abstract

We study the sources of systematic errors in the measurement of the W to lepton and neutrino cross-sections at the LHC. We consider the systematic errors in both the total cross-section and acceptance for anticipated experimental cuts. We include the best available analysis of QCD effects at NNLO in assessing the effect of higher order corrections and PDF and scale uncertainties on the theoretical acceptance. In addition, we evaluate the error due to missing NLO electroweak corrections and propose which MC generators and computational schemes should be implemented to best simulate the events.