Rise of the DIS structure function F_L at small x caused by double-logarithmic contributions

Published 19 Dec 2020 in hep-ph and hep-ex | (2012.10633v3)

Abstract: We present calculation of F_L in the double-logarithmic approximation 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 F_L at small x and arbitrary Q^2.

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