Probing the Sea Quark Content of the Proton with One-Particle-Inclusive Processes

Abstract

We investigate the feasibility of constraining parton distribution functions in the proton through a comparison with data on semi-inclusive deep-inelastic lepton-nucleon scattering. Specifically, we reweight replicas of these distributions according to how well they reproduce recent, very precise charged kaon multiplicity measurements and analyze how this procedure optimizes the determination of the sea quark densities and improves their uncertainties. The results can help to shed new light on the long standing question on the size of the flavor and charge symmetry breaking among quarks of radiative origin. An iterative method is proposed and adopted to account for the inevitable correlation with what is assumed about the parton-to-hadron fragmentation functions in the reweighting procedure. It is shown how the fragmentation functions can be optimized simultaneously in each step of the iteration. As a first case study, we implement this method to analyze kaon production data.

9 pages, 8 figures

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Cited by in corpus (9)

• Parton Distributions in Nucleons and Nuclei
• nNNPDF2.0: Quark Flavor Separation in Nuclei from LHC Data
• The Strangest Proton?
• Towards a Global QCD Analysis of Fragmentation Functions at Next-To-Next-To-Leading Order Accuracy
• Semi-inclusive Deep-Inelastic Scattering, Parton Distributions and Fragmentation Functions at a Future Electron-Ion Collider
• The Sea of Quarks and Antiquarks in the Nucleon: a Review
• Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab
• Determining the helicity structure of the nucleon at the Electron Ion Collider in China
• Exploring the substructure of nucleons and nuclei with machine learning