Nonlinear Phenomena in Complex Systems, 2024, Vol.27, No.4, pp.366

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2024, Vol.27, No.4, pp.366 - 371

Is it Possible to Match Higher-Twist Contributions with Chiral Perturbation Theory?

D. A. Volkova, N. A. Gramotkov, O. V. Teryaev, and O. P. Solovtsova

We present a QCD-motivated approach to the analysis of polarized Bjorken sum rule in the nonperturbative infrared region Q² < 1 GeV². In this approach, we use the Gerasimov–Drell–Hearn sum rule as a boundary condition and move from the region of large momentum transfers to the low Q²-region. We show that the developed approach works well and note a possible problem with the Jefferson Lab data at Q² < 0.1 GeV².

Key words: spin structure functions, Bjorken sum rule, perturbation theory, operator product extension, Gerasimov–Drell–Hearn sum rule

DOI: https://doi.org/10.5281/zenodo.14508835

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