aMC@NLO predictions for Wjj production at the Tevatron

TL;DR

This paper uses aMC@NLO to accurately predict W plus two-jet production at the Tevatron, demonstrating the reliability of NLO QCD calculations and showing they do not explain the observed dijet mass excess.

Contribution

The study applies aMC@NLO to W+2-jet production, confirming the perturbative expansion's stability and ruling out NLO corrections as the source of the CDF dijet excess.

Findings

Perturbative expansion is well-behaved for studied observables

NLO corrections do not account for the CDF dijet mass excess

Predictions are reliable for experimental analysis

Abstract

We use aMC@NLO to predict the lv+ 2-jet cross section at the NLO accuracy in QCD matched to parton shower simulations. We find that the perturbative expansion is well behaved for all the observables we study, and in particular for those relevant to the experimental analyses. We therefore conclude that NLO corrections to this process cannot be responsible for the excess of events in the dijet invariant mass observed by the CDF collaboration.