期刊
PHYSICS LETTERS B
卷 723, 期 4-5, 页码 348-350出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2013.05.026
关键词
Perturbative Quantum Chromodynamics; Deep inelastic scattering
资金
- Federal Program 'Researches and developments of priority directions of science and technology in Russia' [16.518.11.7072]
- [NS-5590.2012.2]
It is shown that the existing four-loop result for the Bjorken polarized sum rule for deep inelastic electron-nucleon scattering obtained within perturbative Quantum Chromodynamics should be supplemented by the calculation of the diagrams of the so-called singlet type. We also give an explanation of the interesting coincidence of two different classes of diagrams, one of the non-singlet and one of the singlet type, contributing the alpha(4)(s)-approximation to the total cross-section of electron-positron annihilation into hadrons. (C) 2013 Elsevier B.V. All rights reserved.
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