A Brief Look at the Chirality-Flow Formalism for Standard Model Amplitudes

Summary, in English

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(2)) by treating each Weyl spinor as part of a flow line with definite chirality and momentum. This formalism, dubbed the chirality-flow formalism, eliminates all non-trivial algebra from tree-level spinor-helicity calculations, thus allowing the shortest possible route from Feynman diagrams to complex numbers (spinor inner products). In this presentation, we briefly introduce the main features of this method and show some examples.

• Author: Joakim Alnefjord; Andrew Lifson; Christian Reuschle; Malin Sjodahl
• Department/s: Theoretical Particle Physics - Has been reorganised
• Publishing year: 2021-11-17
• Language: English
• Publication/Series: Proceedings of Science
• Volume: 397
• Links: https://arxiv.org/pdf/2110.04125.pdf; http://dx.doi.org/10.48550/arXiv.2110.04125
• Document type: Conference paper
• Publisher: Sissa Medialab srl
• Topic: Subatomic Physics
• Conference name: 9th Annual Conference on Large Hadron Collider Physics, LHCP 2021
• Conference date: 2021-06-07 - 2021-06-12
• Conference place: Virtual, Online
• Status: Published
• ISBN/ISSN/Other: ISSN: 1824-8039