Contribution of the twist-3 fragmentation function to single transverse-spin asymmetry in SIDIS
Koichi Kanazawa, Yuji Koike
TL;DR
This paper investigates how twist-3 fragmentation functions influence single transverse-spin asymmetries in SIDIS, employing collinear factorization and QCD Ward-Takahashi identities to develop a formalism for calculating non-pole contributions.
Contribution
It introduces a collinear twist-3 formalism in the Feynman gauge for analyzing the role of twist-3 fragmentation functions in SIDIS asymmetries, focusing on non-pole contributions.
Findings
Established the collinear twist-3 formalism in Feynman gauge.
Calculated non-pole contributions using Ward-Takahashi identities.
Provided a framework for analyzing twist-3 effects in SIDIS asymmetries.
Abstract
We study the contribution of the twist-3 fragmentation function to the single transverse-spin asymmetry in SIDIS within the framework of the collinear factorization. Using the Ward-Takahashi identity in QCD, we establish the collinear twist-3 formalism in the Feynman gauge to calculate its non-pole contribution to the asymmetry.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Cosmology and Gravitation Theories