The study of uncertainties in theory predictions in single inclusive jet production cross section using the APPLGRID package

TL;DR

This paper introduces a method using the APPLGRID package to incorporate and analyze uncertainties in theoretical predictions of single inclusive jet production cross sections, enhancing the precision of proton PDF fits.

Contribution

It presents a novel approach for including various theoretical uncertainties in NLO QCD calculations of jet cross sections using APPLGRID.

Findings

The method enables a posteriori variation of scales and energies.

It allows inclusion of arbitrary PDFs and strong coupling constants.

Uncertainties in jet cross-section predictions at 7 TeV are quantified.

Abstract

A method to facilitate the consistent inclusion of cross-section measurements in proton parton density functions (PDFs) fits in NLO QCD has been developed. It allows the a posteriori variation of the renormalisation and factorisation scales and of the centre-of-mass energy and the inclusion of arbitrary PDFs, strong coupling in cross-section calculations. The theoretical uncertainties in the double differential single inclusive jet cross-section at a $\sqrt{s}=7$ TeV have been studied using this method.