Next-to-leading order predictions for WW+jet production

TL;DR

This paper presents a next-to-leading order calculation for WW+jet production at hadron colliders, including leptonic W decays, using advanced unitarity methods and a Monte Carlo generator to improve prediction accuracy.

Contribution

It introduces a novel NLO calculation for WW+jet production with analytic amplitudes derived via generalized unitarity, implemented in MCFM for collider predictions.

Findings

Accurate total cross-section predictions for LHC and future colliders.

Differential distributions for key observables at NLO accuracy.

Implementation of analytic amplitudes in a Monte Carlo framework.

Abstract

In this work we report on a next-to-leading order calculation of WW + jet production at hadron colliders, with subsequent leptonic decays of the W-bosons included. The calculation of the one-loop contributions is performed using generalized unitarity methods in order to derive analytic expressions for the relevant amplitudes. These amplitudes have been implemented in the parton-level Monte Carlo generator MCFM, which we use to provide a complete next-to-leading order calculation. Predictions for total cross-sections, as well as differential distributions for several key observables, are computed both for the LHC operating at 14 TeV as well as for a possible future 100 TeV proton-proton collider.