The nonperturbative quark-gluon vertex is mapped for the first time in the complex plane, yielding all eight form factors inside a parabolic domain bounded by the first singularity.
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A dressed quark-gluon vertex computed in the symmetric approximation yields light-meson masses that match experiment more closely than rainbow-ladder results.
A mass-dependent renormalization scheme from dimensional regularization yields smooth threshold transitions in QCD and implements the Appelquist-Carazzone theorem by reducing to minimal subtraction at high energies.
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Quark-gluon vertex in the complex plane
The nonperturbative quark-gluon vertex is mapped for the first time in the complex plane, yielding all eight form factors inside a parabolic domain bounded by the first singularity.
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Light mesons in the symmetric-vertex approximation
A dressed quark-gluon vertex computed in the symmetric approximation yields light-meson masses that match experiment more closely than rainbow-ladder results.
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Smooth Threshold Effects from Dimensional Regularization
A mass-dependent renormalization scheme from dimensional regularization yields smooth threshold transitions in QCD and implements the Appelquist-Carazzone theorem by reducing to minimal subtraction at high energies.