PoS - Proceedings of Science
Volume 432 - 16th International Symposium on Radiative Corrections: Applications of Quantum Field Theory to Phenomenology (RADCOR2023) - Main session
Singlet and anomaly contributions to massive QCD form factors
K. Schönwald
Full text: pdf
Pre-published on: September 29, 2023
Published on: January 22, 2024
Massive form factors 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 these proceedings we 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 calculation completes the calculation of
the massive form factors for external vector, axial-vector,
scalar and pseudoscalar currents up to $\mathcal{O}(\alpha_s^3)$.
DOI: https://doi.org/10.22323/1.432.0045
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