Gauge Invariant Lagrangians for Free and Interacting Higher Spin Fields. A Review of the BRST formulation

TL;DR

This paper reviews the BRST approach to constructing gauge invariant Lagrangians for free and interacting higher spin fields, highlighting recent developments and methodologies in the field.

Contribution

It provides a comprehensive overview of the BRST formulation for higher spin gauge theories, emphasizing its application to both free and interacting fields.

Findings

Systematic construction of gauge invariant Lagrangians using BRST methods.

Clarification of the role of gauge invariance in higher spin interactions.

Summary of recent advances in higher spin field theory.

Abstract

We give a detailed review of the construction of gauge invariant Lagrangians for free and interacting higher spin fields using the BRST approach developed over the past few years.