On the spacetime structure of infrared divergencies in QED

TL;DR

This paper analyzes the infrared divergence structure in QED by examining the analytic properties of string-integrated correlation functions and propagators, shedding light on their behavior in massless quantum field theories.

Contribution

It provides new insights into the infrared properties of correlation functions and propagators in QED through analytic investigation of string-integrated quantities.

Findings

Infrared divergences are characterized by specific analytic properties.

String-integrated correlation functions reveal detailed infrared behavior.

Results are relevant for understanding massless quantum field theories.

Abstract

We investigate analytic properties of string-integrated correlation functions and propagators with emphasis on their infrared behaviour. These are relevant in various models of quantum field theory with massless fields, including QED.