Abstract
We present the analytic next-to-next-to-leading perturbative QCD corrections in the leading twist approximation for the moments N = 2, 4, 6, 8 of the flavour singlet deep inelastic structure functions F 2 and F L . We calculate the 3-loop anomalous dimensions of the corresponding singlet operators and the 3-loop coefficient functions of the structure functions F L and F 2. In addition, we obtained the 10th moment for the non-singlet structure functions in the same order of perturbative QCD. We perform an analysis of the obtained results.
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