Non-Universality and Evolution of the Sivers Function
Philip G. Ratcliffe, Oleg Teryaev
TL;DR
This paper investigates the evolution of the Sivers function at large x in QCD, revealing non-universal behavior and modifications due to color factors, with implications for understanding spin-dependent phenomena in high-energy physics.
Contribution
It introduces a novel analysis of the QCD evolution of the Sivers function, highlighting non-universality and the role of color-factor modifications in twist-three gluonic-pole contributions.
Findings
Evolution of the Sivers function is non-universal at large x.
The evolution resembles a color-factor modified twist-two evolution.
The study links the Sivers function evolution to the structure function g2.
Abstract
We examine the large-x QCD evolution of the twist-three gluonic-pole strength defining an effective T-odd Sivers function, where evolution of the T-even transverse-spin DIS structure function g2 is multiplicative. The result corresponds to a colour-factor modified spin-averaged twist-two evolution.
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