Aspects of massive gauge fields

TL;DR

This paper explores the theoretical nuances of massive gauge fields, especially in the massless limit, revealing new connections and raising questions about established theories involving vector and two-form fields.

Contribution

It provides a detailed analysis of the massless limit of massive gauge fields, highlighting novel relationships among different gauge theories and challenging existing assumptions.

Findings

Identifies non-trivial aspects of the massless limit

Establishes new connections among gauge theories

Raises questions about existing theoretical frameworks

Abstract

Massive gauge fields whose mass is introduced by hand form very intriguing theories. They depart from their massless counterparts by a straightforward modification. Yet, taking the limit when the same vanishes poses a non-trivial challenge. In these notes, with a focus on vector and two-form fields, we will discuss several aspects that arise when one explores the massless limit. We will study new connections among different theories, and at times raise a question about the already established ones.