8 papers
Three-loop QCD+QED corrections to on-shell quark renormalization
Long Chen, Hong-Yang Han, Zhe Li +1
We present the three-loop QCD+QED mixed corrections to the on-shell quark mass and wave-function renormalization constants through orders with . We…
Three-loop QCD Mass Relation between the and Symmetric-momentum Subtraction Scheme Away from the Chiral Limit
Long Chen, Marco Niggetiedt
The perturbative result for the quark-mass conversion factor between the and regularization-independent symmetric-momentum subtraction scheme (RI/SMOM) awa…
On-shell Matrix Elements of the EMT Trace in Gauge Theories and Heavy Quark Masses
Long Chen, Zhe Li, Marco Niggetiedt
We present a novel diagrammatic proof of the identity between the forward matrix element of the energy-momentum-tensor (EMT) trace operator over a single particle's on-shell state…
Precision tests of third-generation four-quark operators: and
Ulrich Haisch, Marco Niggetiedt
We compute the two-loop contributions to Higgs production via gluon-gluon fusion () and Higgs decay into two photons (), arising from third-generation four-qu…
Renormalization of the pseudoscalar operator at four loops in QCD
Long Chen, MichaÅ Czakon, Marco Niggetiedt
We present the renormalization constant of the pseudoscalar operator defined with a non-anticommuting in dimensional regularization up to four-loop order in perturbative Qua…
Quark Mass Effects in Higgs Production
MichaÅ Czakon, Felix Eschment, Marco Niggetiedt +2
We examine the effect of finite top- and bottom-quark masses on the Higgs production cross section in the gluon-gluon fusion channel. We employ both and on-s…