Apr 25 – 30, 2022
Europe/Berlin timezone

The complete singlet contribution to the massless quark form factor at three loops in QCD

Apr 29, 2022, 11:30 AM
Raum Graswangtal

Raum Graswangtal


Mr Marco Niggetiedt (RWTH Aachen University)


In this talk, I will present an exact result for the three-loop QCD correction to the axial component of the singlet quark form factor mediated by top quarks.
The result is obtained via a numerical solution of a system of differential equation for the occurring master integrals.
Furthermore, the Wilson coefficient in front of the axial current of massless quarks in the low energy effective QCD is extracted, which can be conveniently used to approximate the leading behavior of the singlet contribution in the large top mass limit.

Primary authors

Dr Long Chen (RWTH Aachen) Mr Marco Niggetiedt (RWTH Aachen University) Prof. Michal Czakon (RWTH Aachen University)

Presentation materials