Collinear factorization for deep inelastic scattering structure functions at large Bjorken xB

TL;DR

This paper investigates the uncertainties in perturbative QCD factorization for deep inelastic scattering at high xB, focusing on target mass corrections and the influence of final-state jet functions on parton distribution extraction.

Contribution

It provides a collinear factorization approach in momentum space to analyze target mass corrections and discusses their impact on parton distribution functions at large xB.

Findings

Target mass corrections can be expressed via parton distribution functions.

The approach clarifies the role of final-state jet functions in high-xB analyses.

Comparison with existing methods highlights the significance of the corrections.

Abstract

We examine the uncertainty of perturbative QCD factorization for hadron structure functions in deep inelastic scattering at a large value of the Bjorken variable xB. We analyze the target mass correction to the structure functions by using the collinear factorization approach in the momentum space. We express the long distance physics of structure functions and the leading target mass corrections in terms of parton distribution functions with the standard operator definition. We compare our result with existing work on the target mass correction. We also discuss the impact of a final-state jet function on the extraction of parton distributions at large fractional momentum x.