Speaker
Description
Massive form factors in QCD are important building blocks in higher order corrections to various observables like heavy quark production, top quark decays or muon-electron scattering, where they describe the virtual contributions. Furthermore, they show universal infrared behaviour which makes them interesting to study also in the context of the infrared structure of QCD amplitudes. In this talk I will present our recent calculation of singlet and anomaly contributions to the massive quark form factors, which is based on expansions around singular and regular points of the master integrals and numerical matching. This completes the calculation of the massive form factors for external vector, axial-vector, scalar and pseudo-scalar currents up to three-loop order.
