The trace anomaly for a chiral fermion
High Energy Physics - Theory
2023-04-14 v1
Abstract
In this paper, we study the problem of trace anomaly for a chiral fermion. To find whether there exists a parity-odd term (Pontryagin term), we use a modified Breitenlohner-Maison-'t Hooft-Veltman regularization and Fujikawa's method by a new Dirac mass term to calculate the trace anomaly for a Weyl fermion coupled to an abelian gauge field and a gravity separately. We show once again that the trace anomaly of energy-momentum tensor for a chiral fermion has Pontryagin term.
Keywords
Cite
@article{arxiv.2304.06507,
title = {The trace anomaly for a chiral fermion},
author = {Chang-Yong Liu},
journal= {arXiv preprint arXiv:2304.06507},
year = {2023}
}
Comments
21 pages, 2 figures