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

TL;DR

This paper uses recent precise measurements of the muon anomalous magnetic moment to set new constraints on hypothetical light bosons mediating exotic interactions involving muons, refining previous limits.

Contribution

It provides updated bounds on light BSM boson-mediated muon interactions based on the latest experimental and theoretical results for the muon anomalous magnetic moment.

Findings

Updated limits on exotic muon interactions derived from recent $a_$ measurements.

Reconciliation of experimental and theoretical $a_$ reduces previous constraints.

Enhanced sensitivity to light BSM bosons mediating muon interactions.

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, $\Delta a_\mu = a^{\rm exp}_\mu - a^{\rm SM}_\mu = (38 \pm 63) \times 10^{-11}$, we derive updated limits on light BSM boson-mediated exotic muon interactions.