New Limits on Exotic Muon Interactions Mediated by Axion-Like Particles
Wu, L. Y., Haobo Yan · arXiv (Cornell University) · 2025
The precise measurement of the muon anomalous magnetic moment $a_μ$ provides a sensitive probe of exotic interactions between muons mediated by light beyond the Standard Model (BSM) bosons. Recent advances in both experiment and theory have largely reconciled the long-standing discrepancy in $a_μ$. Using the latest result, $Δa_μ= a^{\rm exp}_μ- a^{\rm SM}_μ= (38 \pm 63) \times 10^{-11}$, we derive updated limits on light BSM boson-mediated exotic muon interactions.