We describe the calculation of the two--loop massive operator matrix elements for massive external fermions. These matrix elements are needed for the calculation of the O(α2) initial state radiative corrections to e+e− annihilation into a neutral virtual gauge boson, based on the renormalization group technique.
@article{arxiv.0812.1588,
title = {Two-loop massive fermionic operator matrix elements and intial state QED corrections to e^+e^- \to \gamma^*/Z^*},
author = {J. Blümlein and A. De Freitas and W. van Neerven},
journal= {arXiv preprint arXiv:0812.1588},
year = {2009}
}
Comments
6 pages, 16 figures, Contribution to the Proceedings of RADCOR 2007