The impact of LHC precision measurements of inclusive jet and dijet production on the CTEQ-TEA global PDF fit

TL;DR

This paper evaluates how recent LHC measurements of inclusive jet and dijet production influence the proton's gluon distribution in global PDF fits, using NNLO predictions to understand their impact on high-energy collider phenomenology.

Contribution

It provides a detailed analysis of the constraints from LHC jet data on the gluon PDF at large x, incorporating NNLO theoretical predictions and uncertainty assessments.

Findings

Inclusive jet data has a smaller scale dependence than dijet data.

Jet measurements significantly constrain the gluon distribution at high x.

Implications for Higgs and top quark production at 14 TeV LHC are discussed.

Abstract

In this study, we investigate the impact of new LHC inclusive jet and dijet measurements on parton distribution functions (PDFs) that describe the proton structure, with a particular focus on the gluon distribution at large momentum fraction, $x$, and the corresponding partonic luminosities. We assess constraints from these datasets using next-to-next-to-leading-order (NNLO) theoretical predictions, accounting for a range of uncertainties from scale dependence and numerical integration. From the scale choices available for the calculations, our analysis shows that the central predictions for inclusive jet production show a smaller scale dependence than dijet production. We examine the relative constraints on the gluon distribution provided by the inclusive jet and dijet distributions and also explore the phenomenological implications for inclusive $H$, $t\bar{t}$, and $t\bar{t}H$ production at the LHC at 14 TeV.