Deep-inelastic structure functions at two loops

We present the analytic calculation of the Merlin moments of the structure functions F-2, F-3 and F-L in perturbative QCD up to second-order correctio ns and in reading twist approximation. We calculate the two-loop contributi ons to the anomalous dimensions of the singlet and non-singlet operator mat rix elements and the two-loop coefficient functions of F-2, F-3 and F-L. We perform the inverse Mellin transformation analytically and find our result s in agreement with earlier calculations in the literature by Zijlstra and van Neerven. (C) 2000 Elsevier Science B.V. All rights reserved.