Revisiting Wess-Zumino-Witten terms
Revisiting Wess-Zumino-Witten terms
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DOI:
10.21468/scipostphys.10.3.061
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发表时间:
2020-08
期刊:
影响因子:
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通讯作者:
Yasunori Lee;K. Ohmori;Yuji Tachikawa
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文献类型:
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作者:
Yasunori Lee;K. Ohmori;Yuji Tachikawa
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. We also discuss how the mixed anomaly involving the 1-form symmetry of $SO$ QCD is reproduced in the low-energy sigma model.