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

Abstract

The precise measurement of the muon anomalous magnetic moment $a_{\hat{I}}¼$ 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 $a_{\hat{I}}¼$. Using the latest result, $\hat{I}”a_{\hat{I}}¼=a_{\hat{I}}^{\exp }¼-a_{\hat{I}}^{\mathrm{SM}}¼=(38\pm 63)\times 10^{-11}$, we derive updated limits on light BSM boson-mediated exotic muon interactions.

4 pages, 1 figure