New constraints on the up-quark valence distribution in the proton

Abstract

The high-$x$ data from the ZEUS Collaboration are used to extract parton density distributions of the proton deep in the perturbative regime of QCD. The data primarily constrain the up-quark valence distribution and new results are presented on its $x$-dependence as well as on the momentum carried by the up-quark. The results were obtained using Bayesian analysis methods which can serve as a model for future parton density extractions.

Minor changes in final published version

References in corpus (5)

• The Path to Proton Structure at One-Percent Accuracy
• QCDNUM: Fast QCD Evolution and Convolution
• The PDF4LHC21 combination of global PDF fits for the LHC Run III
• QED Parton Distribution Functions in the MSHT20 Fit
• Testing momentum dependence of the nonperturbative hadron structure in a global QCD analysis

Cited by in corpus (3)

• Deep-Inelastic Scattering at TeV Energies with LHC Muons
• PartonDensity.jl: a novel parton density determination code
• QCD analysis of valence structure functions using deep inelastic lepton-nucleon scattering