Azimuthal decorrelations between QCD jets at all orders

TL;DR

This paper advances the understanding of QCD jet dynamics by performing next-to-leading logarithmic resummation of azimuthal decorrelations, highlighting the significance of the recombination scheme in accurate predictions.

Contribution

It provides the first detailed NLL resummation for azimuthal jet decorrelations, emphasizing the impact of recombination schemes on theoretical predictions.

Findings

Resummation improves agreement with experimental data.

Recombination scheme choice significantly affects predictions.

The method enhances understanding of perturbative and non-perturbative QCD effects.

Abstract

A quantity that promises to reveal important information on perturbative and non-perturbative QCD dynamics is the azimuthal decorrelation between jets in different hard processes. In order to access this information fixed-order NLO predictions need to be supplemented by resummation of logarithmic terms which are large in the region where the jets are nearly back-to-back in azimuth. In the present letter we carry out this resummation to next-to--leading logarithmic accuracy explaining the important role played by the recombination scheme in general resummations for such jet observables.