Differential single jet inclusive production at Next-to-Next-to-Leading Order in QCD

TL;DR

This paper presents a comprehensive NNLO QCD calculation of single jet inclusive cross sections, analyzing scale choices and comparing predictions with ATLAS data, showing improved accuracy and reduced theoretical uncertainties.

Contribution

The work provides the first fully differential NNLO calculation of single jet inclusive production across all partonic channels, including detailed scale dependence analysis.

Findings

Significant low-$p_T$ effects from scale choice variations.

At high-$p_T$, different scale choices yield similar results.

NNLO corrections substantially reduce scale dependence.

Abstract

In this talk we present the recent calculation in all partonic channels of the fully differential single jet inclusive cross section at Next-to-Next-to-Leading Order in QCD. We discuss the size and shape of the perturbative corrections as a function of the functional form of the renormalisation and factorisation scales and compare the predictions at NLO and NNLO to the available ATLAS 7 TeV data. We find significant effects at low-$p_T$ due to changes in the functional form of the scale choice whereas at high-$p_T$ the two most common scale choices in the literature give identical results and the perturbative corrections lead to a substantial reduction in the scale dependence of the theoretical prediction at NNLO.