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Updated: May 22, 2025

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Published on: November 15, 2013
Wess-Zumino-Witten Interactions of Axions
Yang Bai1, Ting-Kuo Chen1, Jia Liu2,3
1University of Wisconsin-Madison, Department of Physics, Madison, Wisconsin 53706, USA.
Abstract:
We present a consistent derivation of the complete Wess-Zumino-Witten interactions of axions, including the counter-term necessary to guarantee the gauge invariance of the standard model. By treating the derivative of the axion field as a background gauge field and incorporating auxiliary chiral rotation phases, we ensure consistency in the axion-interaction Lagrangian. This approach allows us to derive basis-independent physical interactions of axions with gauge bosons and vector mesons. These interactions have broad applications in axion phenomenology for both light and heavy axion particles.
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