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Baikov, P. A.; Mikhailov, S. V.
The journal of high energy physics, 09/2022, Letnik: 2022, Številka: 9Journal Article
A bstract We derive explicit expressions for the elements of the { β }-expansion for the nonsinglet Adler D A -function and Bjorken polarized sum rules S Bjp in the N 4 LO using recent results by Chetyrkin for these quantities computed within extended QCD including any number of fermion representations. We discuss the properties of the { β }-expansion for D A and S Bjp at higher orders which follow from the Crewther 1 and the Broadhurst-Kataev 2 relation.
