KnowraScattering amplitudeLinked fromLinked fromThe 9 pages that link to Scattering amplitude, each with the reason it gives.All 9Broader topic 1Related 6Narrower topic 2Feynman diagramNarrower topic: Summing diagram contributions yields the perturbative scattering amplitude.Optical theoremNarrower topic: The theorem extracts the total cross section from one specific value of this quantity.