On transverse spin sum rules

TL;DR

This paper provides explicit calculations supporting previous conclusions on transverse polarization and compares two methods for deriving spin sum rules, clarifying theoretical approaches in the field.

Contribution

It offers a detailed comparison of two methods for deriving transverse spin sum rules and supports earlier findings with explicit calculations.

Findings

Explicit calculations confirm previous conclusions on transverse polarization.

Comparison of two derivation methods clarifies theoretical approaches.

Supports the validity of spin sum rules in transverse polarization context.

Abstract

In this work we provide explicit calculations that support the conclusions stated in Phys. Rev. Lett. 111, 039102 (2013) (comment), regarding recent literature on transverse polarization. We also compare and contrast two methods of deriving spin sum rules.