# Analytical expression for the nonsinglet structure functions at small x in the double logarithmic approximation Academic Article

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### abstract

• A simple analytic expression for the nonsinglet structure function ${f}_{\mathrm{NS}}$ is given. The expression is derived from the result of Ermolaev, Manaenkov, and Ryskin obtained by low x resummation of the quark ladder diagrams in the double logarithmic approximation of perturbative QCD.

### publication date

• January 1, 2004