By taking the high-energy limit of the two-loop amplitudes for parton-parton scattering, we have tested the validity of Fadin-Lipatov's ansatz for parton-parton scattering in the high-energy limit. As expected, we have found that it holds at LL and NLL accuracy, and hence we have independently re-evaluated the two-loop Regge trajectory, finding full agreement with the previous results by Fadin and collaborators. We have found, though, that the universality implied by the ansatz is violated at the next-to-next-to-leading logarithmic level.
@article{arxiv.hep-ph/0109028,
title = {The high energy limit of QCD at two loops},
author = {Vittorio Del Duca and E. W. N. Glover},
journal= {arXiv preprint arXiv:hep-ph/0109028},
year = {2010}
}