Precision physics in jet processes

TL;DR

This paper improves theoretical predictions for small-radius jet spectra by combining fixed-order calculations, resummation techniques, and non-perturbative corrections, leading to better agreement with experimental data.

Contribution

It introduces a new method for uncertainty estimation in NLO predictions and incorporates NNLO corrections with resummation for enhanced accuracy.

Findings

Enhanced agreement with ALICE and ATLAS data.

Improved theoretical uncertainty evaluation.

Successful integration of NNLO and LL$_R$ resummation.

Abstract

We examine properties of small-radius jets, focusing on phenomenological applications to the inclusive jet spectrum. We match fixed-order calculations with the leading-logarithmic resummation of the jet radius (LL$_R$), and propose a new prescription to evaluate theoretical uncertainties for next-to-leading order (NLO) predictions. We also examine the $R$-dependent next-to-next-to-leading order (NNLO) corrections, and include them in our calculation. We discuss hadronisation corrections, which are derived from Monte Carlo generators. Finally, we assemble these elements and compare the ratio of the inclusive jet spectra at two $R$ values obtained from our matched (N)NLO+LL$_R$ predictions to data from ALICE and ATLAS, finding improved agreement.