3 papers
hep-ph2021
A Brief Look at the Chirality-Flow Formalism for Standard Model Amplitudes
Joakim Alnefjord, Andrew Lifson, Christian Reuschle +1
Inspired by the flow description of su(N) colour calculations, we recently showed how to simplify the spinor-helicity formalism (at the algebra level two copies of complexified su(…
hep-ph2020
Calculating the primary Lund Jet Plane density
Andrew Lifson, Gavin P. Salam, Gregory Soyez
The Lund-jet plane has recently been proposed as a powerful jet substructure tool with a broad range of applications. In this paper, we provide an all-order single logarithmic calc…
hep-ph2020
The chirality-flow formalism
Andrew Lifson, Christian Reuschle, Malin Sjodahl
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 fo…