How is transversity related to helicity for quarks and antiquarks inside the proton?

TL;DR

This paper explores the relationship between transversity and helicity distributions of quarks and antiquarks in the proton, providing predictions consistent with experimental data and proposing new insights for antiquark distributions.

Contribution

It offers a theoretical analysis linking transversity and helicity distributions and predicts antiquark transversity distributions, extending current understanding.

Findings

Predictions align with experimental data for light quarks.

Provides first estimates for antiquark transversity distributions.

Suggests simple relations between transversity and helicity distributions.

Abstract

We consider the quark and antiquark transversity distributions inside a polarized proton and we study how they are expected to be related to the corresponding helicity distributions, both in sign and magnitude. Our considerations lead to simple predictions in good agreement with their first determination for light quarks from experimental data. We also give our predictions for the light antiquarks transversity distributions, so far unknown.