Anomalies from an effective field theory perspective
Abstract
The path-integral measure of a gauge-invariant fermion theory is transformed under the chiral transformation and leads to an elegant derivation of the anomalous chiral Ward-Takahashi identities, as we know from the seminal work of Fujikawa. We present in this work an alternative and illuminating way to calculate the Jacobian in the path-integral measure from the Covariant Derivative Expansion technique used in Effective Field Theory. We present several ways to customize the crucial regularization such that the anomaly is located in the desired current, which is unprecedented within the path integral approach. We are then able to derive, in a transparent and unified way the covariant, consistent, gravitational and scale anomalies.
Cite
@article{arxiv.2205.02248,
title = {Anomalies from an effective field theory perspective},
author = {Baptiste Filoche and Rémy Larue and Jérémie Quevillon and Pham Ngoc Hoa Vuong},
journal= {arXiv preprint arXiv:2205.02248},
year = {2023}
}
Comments
48 pages, v2 extended computations and clarified discussions. Version accepted for publication in PRD