One-loop calculations in the chirality-flow formalism

Summary, in English

In a few recent papers we introduced the chirality-flow formalism, which was shown to make calculations of tree-level Feynman diagrams simple and transparent. Chirality flow, which is based on the spinor-helicity formalism, allows to often immediately analytically write down a tree-level Feynman diagram in terms of spinor inner products. In this paper, we argue that there is also a significant simplification of the Lorentz structure at the one-loop level, at least when using the four-dimensional formulation of the four-dimensional helicity scheme. Additionally, we find that the possible terms in a tensor decomposition of loop integrals are highly constrained, and therefore the tensor reduction procedure is simplified.

• Author: Andrew Lifson; Malin Sjodahl; Simon Plätzer
• Department/s: Particle and nuclear physics; Theoretical Particle Physics - Has been reorganised
• Publishing year: 2023-03-06
• Language: English
• Links: https://arxiv.org/pdf/2303.02125
• Document type: Preprint
• Topic: Subatomic Physics
• Status: Published
• Project: The Chirality-Flow Formalism and Optimising Scattering Amplitudes