New Limits on Exotic Muon Interactions Mediated by Axion-Like Particles

Abstract

The precise measurement of the muon anomalous magnetic moment $a_{\mu }$ 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 $a_{\mu }$. Using the latest result, $\Delta a_{\mu }=a_{\mu }^{\exp }-a_{\mu }^{\mathrm{SM}}=(38\pm 63)\times 10^{-11}$, we derive updated limits on light BSM boson-mediated exotic muon interactions.

Comments: 4 pages, 1 figure