Diagrammatic insights into next-to-soft corrections

TL;DR

This paper uses diagrammatic techniques to confirm the structure of next-to-soft corrections in gauge and gravity theories, providing new insights and tools, and exploring a double copy relation between these corrections.

Contribution

It offers an alternative diagrammatic approach to understanding next-to-soft theorems and investigates the double copy relation in this context.

Findings

Confirmed theorems for next-to-soft corrections using diagrammatic methods

Provided new tools for studying next-to-soft theorems

Explored the double copy relation between gauge and gravity corrections

Abstract

We confirm recently proposed theorems for the structure of next-to-soft corrections in gauge and gravity theories using diagrammatic techniques, first developed for use in QCD phenomenology. Our aim is to provide a useful alternative insight into the next-to-soft theorems, including tools that may be useful for further study. We also shed light on a recently observed double copy relation between next-to-soft corrections in the gauge and gravity cases.