Discrete gauge anomalies and instantons
Abstract We revisit anomalous phases related to large gauge transformations, such as the Witten anomaly. The latter, known to plague d = 4 Sp(k) theories, is well-understood in terms of π 4(Sp(k)) = ℤ2, but it also has an oblique relation to the instantons, labeled by π 3(G) = ℤ, via the fermion zer...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2024-08-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP08(2024)018 |
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