A precisely feasible gauged model of chiral boson with its BRST cohomological perspectives

TL;DR

This paper explores a gauge-invariant reformulation of a chiral boson model, analyzing its BRST symmetry and cohomological structure, and establishing connections with differential geometry concepts.

Contribution

It introduces a gauge-invariant version of a chiral boson model with BRST symmetry, linking its algebraic structure to de Rham cohomology.

Findings

Equivalent to chiral Schwinger model with Faddeevian anomaly

Constructed BRST invariant effective action

Established algebraic similarity to de Rham cohomology

Abstract

We find that Siegel type chiral boson with a parameter-dependent Lorentz non-covariant masslike term for the gauge fields to be equivalent to the chiral Schwinger model with one parameter class of Faddeevian anomaly if the model is described in terms of Floreanini-Jackiw type chiral boson. By invoking the Wess-Zunino field gauge-invariant reformulation is made. It has been shown that the gauge-invariant model has the same physical content as its gauge non-invariant ancestor had. The BRST invariant effective action corresponding to this model has also been constructed. All the nilpotent symmetries associated with the BRST symmetry along with the bosonic, ghost, and discrete symmetries have been systematically studied. We establish that the nilpotent charges corresponding to these symmetries resemble the algebra of the de Rham cohomological operators in differential geometry. In the environment of conserved charges associated with the models, we study the Hodge decomposition theorem on the compact manifold.