arXiv:hep-ph/0406046·v2·High Energy Physics — Phenomenology
Two-loop QCD Corrections to the Heavy Quark Form Factors: the Vector Contributions
W. Bernreuther🇩🇪 · R. Bonciani🇩🇪 · T. Gehrmann🇨🇭 · R. Heinesch🇩🇪 · T. Leineweber🇩🇪 · P. Mastrolia🇺🇸 · E. Remiddi🇨🇭
Abstract
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.
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