Wess-Zumino-Witten interactions of axions: three-flavor

作者：Yang Bai, Ting-Kuo Chen, Jia Liu, Xiaolin Ma · 发表于：Journal of High Energy Physics · 年份：2026 · DOI：10.1007/jhep02(2026)117 · 被引用次数：3 · 研究领域：Cosmology and Gravitation Theories、Dark Matter and Cosmic Phenomena、Galaxies: Formation, Evolution, Phenomena

A bstract We present a complete Lagrangian describing axion interactions with pseudoscalar and (axial-)vector mesons within the three light-flavor quark framework. This formulation incorporates both the standard chiral Lagrangian and the full Wess-Zumino-Witten (WZW) term. By including instanton effects associated with the anomalous U(1) A symmetry, we demonstrate that physical observables remain invariant under arbitrary chiral phase rotations of the quark fields. This comprehensive Lagrangian provides a robust and consistent framework for exploring axion phenomenology through its interactions with mesons and gauge bosons. As a demonstration, we compute the decay widths of GeV-scale axions into various mesonic final states for several benchmark axion models.