Revisiting Wess-Zumino-Witten terms
High Energy Physics - Theory
2021-03-10 v2 Strongly Correlated Electrons
Abstract
We revisit various topological issues concerning four-dimensional ungauged and gauged Wess-Zumino-Witten (WZW) terms for and quantum chromodynamics (QCD), from the modern bordism point of view. We explain, for example, why the definition of the WZW terms requires the spin structure. We also discuss how the mixed anomaly involving the 1-form symmetry of QCD is reproduced in the low-energy sigma model.
Cite
@article{arxiv.2009.00033,
title = {Revisiting Wess-Zumino-Witten terms},
author = {Yasunori Lee and Kantaro Ohmori and Yuji Tachikawa},
journal= {arXiv preprint arXiv:2009.00033},
year = {2021}
}
Comments
59 pages; v2: minor changes