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arXiv · 2406.11948

Wess-Zumino-Witten Interactions of Axions

Yang Bai·Ting-Kuo Chen·Jia Liu·Xiaolin Ma
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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. As an example, we explore the interaction of $a$-$\omega$-$\gamma$ to illustrate the potential for searching for axion-like particles at colliders.

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Yang Bai, Ting-Kuo Chen, Jia Liu, Xiaolin Ma. 2024-06-17. Wess-Zumino-Witten Interactions of Axions. https://doi.org/10.1103/physrevlett.134.081803

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