https://doi.org/10.1140/epjp/s13360-024-05601-5
Regular Article
AAK24: Global QCD analysis on polarized parton distribution in the presence of 
asymmetry measurements
1
Department of Physics Education, Farhangian University, P.O.Box 14665-889, Tehran, Iran
2
School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), P.O.Box 19395-5531, Tehran, Iran
3
Department of Physics, Faculty of Nano and Bio Science and Technology, Persian Gulf University, 75169, Bushehr, Iran
4
AGH University, Faculty of Physics and Applied Computer Science, Al. Mickiewicza 30, 30-055, Kraków, Poland
5
Department of Physics, University of Science and Technology of Mazandaran, P.O.Box 48518-78195, Behshahr, Iran
Received:
25
April
2024
Accepted:
29
August
2024
Published online:
20
September
2024
This article introduces AAK24, a Next-to-Leading Order QCD analysis of polarized data from both polarized Deep Inelastic Scattering (DIS) and Semi-Inclusive Deep Inelastic Scattering (SIDIS) experiments on the nucleon. The AAK24 QCD analysis incorporates SU(2) and SU(3) symmetry breaking, specifically 
, while assuming 
and 
are equal. Emphasizing the significance of the semi-inclusive data, the study explores the determination of polarized sea-quark distributions. Recent experimental data from JLAB17, COMPASS16, and COMPASS17, including the asymmetry measurements along with SIDIS observables, are thoroughly examined for their impact on the central values of polarized PDFs, their uncertainties, and overall fit quality. Additionally, we include the non-perturbative target mass corrections as well as higher-twist terms (HT) which are particularly important. In this work, the uncertainties are quantified using the standard Hessian method. The main results and findings of the AAK24 QCD analysis show overall good agreement with the analyzed experimental data, aligning well with other polarized PDF determinations, particularly DSSV14, LSS10, JAM17, and AKS14, all considering SU(2) and SU(3) symmetry breaking.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
