Speaker
Andrew Lifson
Description
Two years ago, we introduced a new method for calculating Feynman diagrams more efficiently and transparently, the chirality-flow formalism. In this framework, which builds on the spinor-helicity formalism and is inspired by QCD colour flow, analytic tree-level Standard Model Feynman diagrams can be written down almost immediately as complex numbers, without the need for intermediate algebra. In this talk, I will introduce chirality flow, and --- as a proof-of-concept --- discuss how using it for massless QED makes MadGraph5_aMC@NLO a factor 2-10 times faster for processes with up to 7 final-state particles, with increasing speed gain for increasing multiplicity.
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Author
Andrew Lifson
Co-author
Malin Sjödahl
