Berry phase in axion physics, SM global structure, and generalized symmetries
arXiv:2411.04749 · doi:10.1016/j.physletb.2026.140218
Abstract
We investigate the Berry phase arising from axion-photon and axion-fermion interactions. The effective Hamiltonians in both systems share the same form, enabling a unified description of the Berry phase and providing a novel perspective on axion experiments. We conceptually propose a new photon-ring experiment for axion detection. Furthermore, we demonstrate that measuring the axion-induced Berry phase offers a unique method for probing the global structure of the Standard Model gauge group and axion-related generalized symmetries.
12 pages, 4 figures