Construction of consistent interactions in higher derivative Yang-Mills gauge theory with matter fields

TL;DR

This paper develops a method to construct consistent interactions in higher derivative Yang-Mills gauge theories with matter fields, revealing a transition from Abelian to non-Abelian gauge symmetry after deformation.

Contribution

It introduces a systematic approach using order reduction and BRST deformations to derive consistent couplings in higher derivative gauge theories.

Findings

Deformations truncated at fourth order with no higher-order contributions.

Local Abelian symmetry becomes non-Abelian after deformation.

Consistent interactions compatible with deformation master equations obtained.

Abstract

We show the consistent interactions in the generalized electrodynamics gauge theory with higher derivative matter fields by means of the order reduction method. We deduce the BRST deformations in the reduced Lagrangian and using the equations of motion of the auxiliary fields in the antighost number zero part in the resulting deformed action, we are able to obtain the consistent coupling terms added into the original Lagrangian density which are compatible with the deformation master equations. We emphasize that the order of deformations is truncated at four and the corresponding higher-order deformations are equal to zero precisely. Moreover, the local Abelian gauge symmetry turns out to be non-Abelian after the deformation procedure.