We compute the one-loop QCD amplitude for the process gg-->Q\bar{Q} in dimensional regularization through order \epsilon^2 in the dimensional regulator and for arbitrary quark mass values. This result is an ingredient of the NNLO cross-section for heavy quark production at hadron colliders. The calculation is performed in conventional dimensional regularization, using well known reduction techniques as well as a method based on recent ideas for the functional form of one-loop integrands in four dimensions.
@article{arxiv.0809.1355,
title = {The one-loop gluon amplitude for heavy-quark production at NNLO},
author = {Charalampos Anastasiou and S. Mert Aybat},
journal= {arXiv preprint arXiv:0809.1355},
year = {2008}
}