Revisiting Wess-Zumino-Witten terms
We revisit various topological issues concerning four-dimensional ungauged and gauged Wess-Zumino-Witten (WZW) terms for $SU$ and $SO$ quantum chromodynamics (QCD), from the modern bordism point of view. We explain, for example, why the definition of the $4d$ WZW terms requires the spin structure...
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| Format: | Article |
| Language: | English |
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SciPost
2021-03-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.10.3.061 |