An interaction vertex joins the field insertions from one interaction term in a Feynman diagram. Its number of incident lines is the number of fields in that term, and its momentum-space Feynman rule includes the interaction coefficient and momentum conservation.
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- Feynman diagram
- Perturbative quantum field theory
- Quantum field theory
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- Auxiliary-field propagator
- Charge-two cubic complex-scalar interaction
- Counterterm closure
- Electron electromagnetic vertex form factors
- Five-line banana integral
- From renormalizability to electroweak predictions
- Gauge boson self-interaction
- Interaction vertex
- Loop Feynman diagram
- Normal-ordering subtraction scheme in two dimensions
- One-loop proper vertices of massless phi-fourth theory
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- Slavnov-Taylor identity
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