Abstract
We present calculation of FL in the double-logarithmic approximation (DLA) and demonstrate that the synergic effect of the factor 1/x from the \( {\alpha}_s^2 \)-order and the steep x-dependence of the totally resummed double logarithmic contributions of higher orders ensures the power-like rise of FL at small x and arbitrary Q2.
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Ermolaev, B.I., Troyan, S.I. Rise of the DIS structure function FL at small x caused by double-logarithmic corrections. J. High Energ. Phys. 2021, 274 (2021). https://doi.org/10.1007/JHEP03(2021)274
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DOI: https://doi.org/10.1007/JHEP03(2021)274