Year: 2026
Type: preprint
Abstract: We identify an overlooked Wess--Zumino--Witten structure in the hidden-local-symmetry~(HLS) formulation of vector mesons. The newly identified term generically leads to the topological quantization of the vector-meson anomalous couplings. If confirmed experimentally, this structure would expose the gauge nature of vector mesons in the anomalous sector and single out HLS over matter-field descriptions. The observed success of vector-meson dominance in anomalous interactions can then be explained by topological-action saturation of the odd-intrinsic-parity processes. Precision measurements of $η^{(\prime)}\toπ^+π^-γ^*$ form factors at BESIII and the Super $τ$-Charm Facility can directly test this saturation picture.
Source: arXiv (Cornell University)
Authors: Geng, Chao-Qiang, Liu, Chia-Wei, Wu, Yue-Liang
Institution: University of Chinese Academy of Sciences
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G2712368410, G3289481219, G4029961619
OpenAlex ID: W7119506113
Cites:
Cited by:
Related to: