Two-loop massive fermionic operator matrix elements and intial state QED corrections to e^+e^- \to γ^*/Z^*

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/226699We 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 $O(α^2)$ initial state radiative corrections to $e^+e^-$ annihilation into a neutral virtual gauge boson, based on the renormalization group technique.6 pages, 16 figures, Contribution to the Proceedings of RADCOR 2007High Energy Physics - PhenomenologyHigh Energy Physics - ExperimentTwo-loop massive fermionic operator matrix elements and intial state QED corrections to e^+e^- \to γ^*/Z^*text