The chirality-flow formalism

Andrew Lifson, Christian Reuschle, Malin Sjodahl

Research output: Contribution to journalArticlepeer-review


We take a fresh look at Feynman diagrams in the spinor-helicity formalism. Focusing on tree-level massless QED and QCD, we develop a new and conceptually simple graphical method for their calculation. In this pictorial method, which we dub the chirality-flow formalism, Feynman diagrams are directly represented in terms of chirality-flow lines corresponding to spinor inner products, without the need to resort to intermediate algebraic manipulations.

Original languageEnglish
Article number1006
JournalEuropean Physical Journal C
Issue number11
Publication statusPublished - 2020

Subject classification (UKÄ)

  • Subatomic Physics


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