Khanpour, Hamzeh and Monfared, S. Taheri and Tehrani, S. Atashbar (2017) Nucleon spin structure functions at NNLO in the presence of target mass corrections and higher twist effects. Physical Review D, 95 (074006). ISSN 2470-0029

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Abstract

We extract polarized parton distribution functions (PPDFs), referred to as “KTA17,” together with the highly correlated strong coupling αs from recent and up-to-date g1 and g2 polarized structure functions world data at next-to-next-to-leading order in perturbative QCD. The stability and reliability of the results are ensured by including nonperturbative target mass corrections as well as higher-twist terms which are particularly important at the large-x region at low Q2. Their role in extracting the PPDFs in the nucleon is studied. Sum rules are discussed and compared with other results from the literature. This analysis is made by means of the Jacobi polynomials expansion technique to the DGLAP evolution. The uncertainties on the observables and on the PPDFs throughout this paper are computed using standard Hessian error propagation which served to provide a more realistic estimate of the PPDFs uncertainties.

Item Type:	Article
Additional Information:	Cite as: Khanpour, Hamzeh & Monfared, S. & Atashbar Tehrani, Shahin. (2017). Nucleon spin structure functions at NNLO in the presence of target mass corrections and higher twist effects. Physical Review D. 95. 074006. 10.1103/PhysRevD.95.074006.
Keywords:	Nucleon spin structure functions; NNLO; target mass corrections; higher twist effects;
Academic Unit:	Faculty of Science and Engineering > Theoretical Physics
Item ID:	14766
Identification Number:	https://doi.org/10.1103/PhysRevD.95.074006
Depositing User:	Hamzeh Khanpour
Date Deposited:	08 Sep 2021 13:56
Journal or Publication Title:	Physical Review D
Publisher:	American Physical Society
Refereed:	No
Funders:	School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), University of Science and Technology of Mazandaran
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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