Twist-3 polarized structure functions
Jiro Kodaira (1), Kazuhiro Tanaka (2) ((1) Hiroshima Univ., (2), Juntendo Univ.)
TL;DR
This paper reviews the theoretical framework of twist-3 polarized structure functions in nucleons within QCD, focusing on gauge invariance, operator definitions, and their Q^2-evolution.
Contribution
It provides a systematic treatment of twist-3 polarized structure functions and highlights the role of QCD equations of motion in their evolution.
Findings
Analysis of gauge invariant, nonlocal light-cone operators
Derivation of anomalous dimensions for Q^2-evolution
Emphasis on unique features of higher twist distributions
Abstract
We review the nucleon's twist-3 polarized structure functions from the viewpoint of gauge invariant, nonlocal light-cone operators in QCD. We discuss a systematic treatment of the polarized structure functions and the corresponding parton distribution functions. We emphasize unique features of higher twist distributions, and the role of the QCD equations of motion to derive their anomalous dimensions for Q^2-evolution.
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