We present closed analytic expressions of the electromagnetic vertex form factors for heavy quarks at the two-loop level in QCD for arbitrary momentum transfer. The calculation is carried out in dimensional regularization. The electric and magnetic form factors are expressed in terms of 1-dimensional harmonic polylogarithms of maximum weight 4.
@article{arxiv.hep-ph/0406046,
title = {Two-loop QCD Corrections to the Heavy Quark Form Factors: the Vector Contributions},
author = {W. Bernreuther and R. Bonciani and T. Gehrmann and R. Heinesch and T. Leineweber and P. Mastrolia and E. Remiddi},
journal= {arXiv preprint arXiv:hep-ph/0406046},
year = {2010}
}
Comments
79 pages, 3 figures. Version accepted by Nucl. Phys. B. All the results in Section 6 of the paper are available in an electronic form in the file formulas.inc