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| Main Author: | |
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| Format: | Preprint |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2202.13893 |
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Table of Contents:
- In this paper, we investigate the Pontryagin trace anomaly for chiral fermions in a general curved background using Pauli-Villars regularization. We use both Feynman diagram method and Fujikawa's method to calculate the parity-odd contribution (Pontryagin term). Our result indicates that the trace anomaly of energy-momentum tensor for chiral fermions has Pontryagin term $P=\frac{i}{1536π^2}ε_{νσκλ}R^{νσ}_{\ \ ρμ}R^{ρμκλ}$ which agrees with the work of Bonora et al \cite{Bonora:2014qla}.