Delineating the polarized and unpolarized partonic structure of the nucleon

TL;DR

This paper presents recent advancements in extracting both polarized and unpolarized parton distribution functions of the nucleon, highlighting new methodologies, updates, and the impact of data on understanding nucleon structure.

Contribution

It introduces the JR14 upgrade of unpolarized PDFs with NNLO accuracy and discusses recent spin-dependent PDF determinations by the JAM collaboration, including correction treatments and data impact.

Findings

Updated unpolarized PDFs with NNLO accuracy

Refined spin-dependent PDFs with hadronic and nuclear corrections

Insights into the nucleon spin structure from current and future data

Abstract

Reports on our latest extractions of parton distribution functions of the nucleon are given. First an overview of the recent JR14 upgrade of our unpolarized PDFs, including NNLO determinations of the strong coupling constant and a discussion of the role of the input scale in parton distribution analysis. In the second part of the talk recent results on the determination of spin-dependent PDFs from the JAM collaboration are reported, including a careful treatment of hadronic and nuclear corrections, as well as reports on the impact of present and future data in our understanding of the spin of the nucleon.