On Bjorken Sum Rule with Analytic Coupling at Low $${Q}^{{2}}$$ ValuesстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 13 ноября 2024 г.
Аннотация:Below, we present a brief review of the recent studies of the polarized Bjorken sum rule \Gamma_{1}^{p−n} (Q2) for small values of Q^2. Our careful analysis reveals an excellent agreement between the experimental data and the predictions recently obtained in the framework of analytic QCD. Well-known perturbative expressions for coupling constant on the contrary lead to a strong difference between these data and turn out to be inapplicable. To estimate calculated phenomenological values, we discussed the photoproduction limit.