Wess-Zumino-Witten Interactions of Axions

作者：Y. Bai, Ting-Kuo Chen, Jia Liu, Xiaolin Ma · 发表于：Physical Review Letters · 年份：2025 · DOI：10.1103/physrevlett.134.081803 · 被引用次数：7 · 研究领域：Dark Matter and Cosmic Phenomena、Particle physics theoretical and experimental studies、Quantum Chromodynamics and Particle Interactions

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.