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All legs incoming. Labels are UFO leg indices. A single vertex is a building block of a process amplitude.
Solid: fermion · wave: gauge boson · coil: gluon · dashed: scalar · dotted: ghost.
| Leg | Particle | PDG | Spin code | Color | Charge |
|---|
UFO spin code = 2s + 1; ghosts use −1. Color ±3 denotes fundamental / antifundamental.
Color × Lorentz × coupling
Tensor slots below are zero-based UFO array indices. Particle indices inside tensor expressions are one-based. Couplings are symbolic, not evaluated.
Parameters and function definitions
Source defaults and definitions, including indirect dependencies. These are external SM inputs.
MTFT evidence
Related research
Reference scope, omissions and provenance
Process benchmarks to build toward
These are proposed checks, with no MTFT amplitude result attached. Fix energy, input parameters, gauge, normalization and perturbative order before comparing the complete amplitudes.