Comment on covariant Stora--Zumino chain terms

TL;DR

This paper discusses the relationship between Ekstrand's recent expression for covariant anomalies and earlier work by Tsutsui, providing insights into covariant chain terms in gauge theories.

Contribution

It clarifies the connection between Ekstrand's formula and Tsutsui's earlier results on covariant chain terms in gauge anomalies.

Findings

Ekstrand's expression relates to Tsutsui's work on covariant anomalies

The paper offers a comparative analysis of two approaches

It enhances understanding of covariant chain term computations

Abstract

In a recent paper, Ekstrand proposed a simple expression from which covariant anomaly, covariant Schwinger term and higher covariant chain terms may be computed. We comment on the relation of his result to the earlier work of Tsutsui.