Abstract
We study the trace and chiral anomalies of Weyl fermions in a non-abelian gauge background in four dimensions. Using a Pauli-Villars regularization we identify the trace anomaly, proving that it can be cast in a gauge invariant form, even in the presence of the non-abelian chiral anomaly, that we rederive to check the consistency of our methods. In particular, we find that the trace anomaly does not contain any parity-odd topological contribution, whose presence has been debated in the recent literature.
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ArXiv ePrint: 1908.03750
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Bastianelli, F., Broccoli, M. Weyl fermions in a non-abelian gauge background and trace anomalies. J. High Energ. Phys. 2019, 241 (2019). https://doi.org/10.1007/JHEP10(2019)241
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DOI: https://doi.org/10.1007/JHEP10(2019)241