Self-Consistent Data Analysis of the Proton Structure Function g1 and Extraction of its Moments

TL;DR

This paper reanalyzes world data on the proton structure function g1, extracting its moments across a wide Q2 range and studying their QCD evolution using the Operator Product Expansion.

Contribution

It provides a self-consistent reanalysis of g1 data and evaluates its moments with a unified approach, enhancing understanding of proton spin structure.

Findings

Reliable moments of g1 were extracted from 0.2 to 30 GeV2.

Q2 evolution of moments was studied within QCD using OPE.

Data analysis improved the understanding of proton spin contributions.

Abstract

The reanalysis of all available world data on the longitudinal asymmetry A|| is presented. The proton structure function g1 was extracted within a unique framework of data inputs and assumptions. These data allowed for a reliable evaluation of moments of the structure function g1 in the Q2 range from 0.2 up to 30 GeV2. The Q2 evolution of the moments was studied in QCD by means of Operator Product Expansion (OPE).