QCD analysis of the Bjorken sum rule revisited

Journal Article · Wed Jan 15 04:00:00 EST 2014 · Physics of Particles and Nuclei

DOI:https://doi.org/10.1134/S106377961401047X· OSTI ID:22977345

Khandramai, V. L. ^[1]; Solovtsova, O. P. ^[1]; Teryaev, O. V. ^[2]

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1. Gomel State Technical University, Gomel (Belarus)
2. Joint Institute for Nuclear Research, Dubna (Russian Federation)

We present extended analysis of the polarized Bjorken sum rule using the four-loop expression for the coefficient function C{sub Bj}(α{sub s}) available now and the recent low Q{sup 2}-data from the Jefferson Lab and COMPASS experiments. We demonstrate that the perturbative series for the function C{sub Bj} gives a hint to its asymptotic nature manifesting itself in the region Q{sup 2} ≲ 1 GeV{sup 2}. It is confirmed by the considered integral model for the perturbative QCD correction. We analyze values of higher-twist terms extracted from the mentioned data and discuss the interplay between higher orders perturbative and higher-twist contributions. We extend our consideration to the Gross-Llewellyn Smith sum rule and investigate the relation between higher twist coefficients in these two sum rules.

• OSTI ID: 22977345
• Journal Information: Physics of Particles and Nuclei, Journal Name: Physics of Particles and Nuclei Journal Issue: 1 Vol. 45; ISSN 1063-7796
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMPTOTIC SOLUTIONS
CEBAF ACCELERATOR
COMPASS DETECTOR
QUANTUM CHROMODYNAMICS
SUM RULES