Probing higher-order corrections in dijet production at the LHC

TL;DR

This paper investigates higher-order corrections in dijet production at the LHC, comparing two resummation methods to identify phase space regions where they differ significantly, aiding experimental distinction.

Contribution

It introduces a detailed comparison of POWHEG and HEJ resummation techniques in dijet observables, highlighting regions with large corrections beyond NLO.

Findings

Identification of phase space regions with large higher-order corrections.

Proposals for experimental analyses to distinguish resummation approaches.

Insights into the theoretical description of dijet production beyond NLO.

Abstract

Both the ATLAS and CMS Collaborations have sought for effects beyond pure next-to-leading order in dijet observables, with the goal to distinguish between the perturbative descriptions provided by a next-to-leading order plus collinear-resummation calculation and by the resummation of wide-angle, hard emissions. In this paper we identify regions of phase space in dijet production where some observables receive large corrections beyond next-to-leading order and study their theoretical description with two tools that perform these two different resummations: the POWHEG BOX and HEJ. Furthermore, we suggest analyses where the predictions from POWHEG and HEJ can be clearly distinguished experimentally.