Some Remarks on Methods of QCD Analysis of Polarized DIS Data

TL;DR

This paper discusses how different QCD analysis methods affect the extraction of polarized parton densities from DIS data, emphasizing the importance of accounting for kinematic and dynamic corrections for accurate results.

Contribution

It highlights the impact of analysis methods and correction considerations on the determination of polarized PDFs from polarized DIS data.

Findings

Analysis method influences polarized PDF results.

Accounting for 1/Q^2 corrections is crucial.

Preasymptotic data require careful QCD-data matching.

Abstract

The results on polarized parton densities (PDFs) obtained using different methods of QCD analysis of the present polarized DIS data are discussed. Their dependence on the method used in the analysis, accounting or not for the kinematic and dynamic 1/Q^2 corrections to spin structure function g_1, is demonstrated. It is pointed out that the precise data in the preasymptotic region require a more careful matching of the QCD predictions to the data in this region in order to determine the polarized PDFs correctly.