Simple Analysis of IR Singularities at One Loop

TL;DR

This paper presents a straightforward power counting method to analyze infrared singularities in one-loop Feynman diagrams, clarifying many known results in quantum field theory.

Contribution

It introduces a simple, systematic approach to understanding IR singularities at one loop, enhancing conceptual clarity and computational efficiency.

Findings

Clarifies the structure of IR singularities using power counting.

Reproduces many known results through a simple analysis.

Provides a foundation for further studies in loop singularities.

Abstract

In this article, we explore the structure of IR singularity of Feynman diagrams at one loop via power counting in loop momentum. The emphasis is on many known results which follow from this simple analysis.