The Chirality-Flow Method for Massive and Electroweak Amplitudes

Sammanfattning: In this thesis I extend the chirality-flow method to the full standard model at tree-level by including massive particles and electroweak interactions. The chirality-flow method is a new diagrammatic method for calculating Feynman diagrams that is based on the spinor-helicity formalism, that before this thesis was written had been worked out for massless QED and QCD at tree-level. I summarize what is known about massive spinor-helicity calculations and use this as the basis for the extended diagrammatic interpretation for massive particles. I use the Lorentz structure of the electroweak vertices to rewrite them in the chirality-flow picture.