Charge Symmetry at the Partonic Level

TL;DR

This review explores the current understanding, models, and experimental efforts regarding charge symmetry violation at the partonic level in nucleon structure functions.

Contribution

It provides a comprehensive overview of theoretical models, experimental limits, and future experiments related to partonic charge symmetry violation.

Findings

Current experimental upper limits on charge symmetry violation.

Models predicting possible charge symmetry violation.

Potential experiments to detect or constrain charge symmetry violation.

Abstract

This review article discusses the experimental and theoretical status of partonic charge symmetry. It is shown how the partonic content of various structure functions gets redefined when the assumption of charge symmetry is relaxed. We review various theoretical and phenomenological models for charge symmetry violation in parton distribution functions. We summarize the current experimental upper limits on charge symmetry violation in parton distributions. A series of experiments are presented, which might reveal partonic charge symmetry violation, or alternatively might lower the current upper limits on parton charge symmetry violation.