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| VOLUME 118 (2023) | ISSUE 7 | PAGE 491 |
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Bjorken sum rule with analytic coupling at low Q2 values
I. R. Gabdrakhmanov+, N. A. Gramotkov+, A. V. Kotikov+, D. A. Volkova+*, I. A. Zemlyakov+×
+Joint Institute for Nuclear Research, 141980 Dubna, Russia *Dubna State University, 141980 Dubna, Russia ×Tomsk State University, 634010 Tomsk, Russia
Abstract
The experimental data obtained for the polarized Bjorken sum rule Γp-n1(Q2) for small values of Q2 are approximated by the predictions obtained in the framework of analytic QCD up to the 5th order perturbation theory, whose coupling constant does not contain the Landau pole. We found an excellent agreement between the experimental data and the predictions of analytic QCD, as well as a strong difference between these data and the results obtained in the framework of perturbative QCD. |