Affiliation:
1. Kavli Institute for the Physics and Mathematics of the Universe
2. Stony Brook University
Abstract
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.
Funder
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
Subject
General Physics and Astronomy
Cited by
17 articles.
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