Issue |
EPL
Volume 139, Number 4, August 2022
|
|
---|---|---|
Article Number | 44001 | |
Number of page(s) | 7 | |
Section | Nuclear and plasma physics, particles and fields | |
DOI | https://doi.org/10.1209/0295-5075/ac83e9 | |
Published online | 09 August 2022 |
Elusive anomalies
International School for Advanced Studies (SISSA) - Via Bonomea 265, 34136 Trieste, Italy
(a) bonora@sissa.it (corresponding author)
Received: 25 May 2022
Accepted: 25 July 2022
Usually, in order to compute an anomaly (be it chiral or trace) with a perturbative method, the lowest significant order is sufficient. With the help of gauge or diffeomorphism invariance it uniquely identifies the anomaly. This note is a short review of the ambiguities that arise in the calculation of trace anomalies, and is meant, in particular, to signal cases in which the lowest perturbative order is not enough to unambiguously identify a trace anomaly. This may shed light on some recent contradictory results.
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