WZ and W+jets production at large transverse momenta beyond NLO

TL;DR

This paper investigates higher order QCD corrections beyond NLO for WZ and W+jets production at high transverse momenta, revealing substantial corrections and reduced uncertainties using the LoopSim method.

Contribution

The study introduces the application of the LoopSim method combined with NLO tools to estimate dominant NNLO corrections at high pT for electroweak boson processes.

Findings

Corrections range from 30% to 100% for key observables.

Significant reduction in scale uncertainties for some distributions.

Higher order effects are crucial at large transverse momenta.

Abstract

We present a study of higher order QCD corrections beyond NLO to processes with electroweak vector bosons. We focus on the regions of high transverse momenta of commonly used differential distributions. We employ the LoopSim method, combined with NLO packages, VBFNLO and MCFM, to merge the NLO samples with different multiplicities, in order to compute the dominant part of the NNLO corrections at high pT. We find that these corrections are indeed substantial, in the 30%-100% range, for a number of experimentally relevant observables. For other observables, they lead to significant reduction of scale uncertainties.