Applications of Symmetry Breaking in Determining PDFs of the Nucleon

TL;DR

This paper reviews how symmetry breaking in parton distribution functions reveals insights into the non-perturbative structure of nucleons, combining theoretical models with experimental data analysis.

Contribution

It introduces a comprehensive review of symmetry breaking effects in nucleon PDFs and provides an estimation of strange quark distributions using combined theoretical and experimental approaches.

Findings

Flavor symmetry breaking affects nucleon PDFs.

Estimated strange and antistrange quark distributions.

Theoretical calculations align with experimental data.

Abstract

Studying the possible breaking of various parton model symmetries by the parton distribution functions of the nucleon can provide important information for the non-perturbative structure of hadrons and the strong interaction. We review theoretical calculations for the breaking of flavor symmetry, quark-antiquark symmetry and charge symmetry in the unpolarized and polarized nucleons using the meson cloud model. We report an estimation for the total distribution of strange and antistrange quarks in the nucleon by combining theoretical calculations of SU(3) flavor symmetry breaking with light antiquark distributions obtained from global analysis of available experimental data.