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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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.