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.
Eichmann, arXiv:2503.10397 [hep-ph] (2025)
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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.
The transverse quark-gluon vertex in Landau gauge QCD shows weak but non-negligible angular dependence with no planar degeneracy; the dynamically generated tensor coupling is the core driver of dynamical chiral symmetry breaking in a self-consistent 3PI DSE system.
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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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No planar degeneracy for the Landau gauge quark-gluon vertex
The transverse quark-gluon vertex in Landau gauge QCD shows weak but non-negligible angular dependence with no planar degeneracy; the dynamically generated tensor coupling is the core driver of dynamical chiral symmetry breaking in a self-consistent 3PI DSE system.