Implications of the Tevatron Jet Results on PDF

TL;DR

This paper presents a detailed measurement of jet production cross sections at the Tevatron, providing new constraints on parton distribution functions, especially the gluon distribution at high momentum fractions, consistent with QCD predictions.

Contribution

It offers the first extensive eta and Et dependence measurement of inclusive jet cross sections at Tevatron energies, improving constraints on gluon PDFs.

Findings

Results agree with next-to-leading order QCD predictions

Indicates a preference for certain parton distribution functions

Provides the world's best constraint on high-x gluon distribution

Abstract

We report a new measurement of the pseudorapidity (eta) and transverse- energy (Et) dependence of the inclusive jet production cross section in pbar p collisions at sqrt(s)=1.8 TeV using 95 pb**-1 of data collected with the D0 detector at the Fermilab Tevatron. The differential cross section d^2sigma/(dEt deta) is presented up to |eta|=3, significantly extending previous measurements. The results are in good overall agreement with next-to-leading order predictions from QCD, indicate a preference for certain parton distribution functions, and provide the world's best constraint on the gluon distribution at high parton momentum fraction x.