  We propose a new scenario of using the dark axion portal at one-loop level to
explain the recently observed muon anomalous magnetic moment by the Fermilab
Muon g-2 experiment. Both axion/axion-like particle (ALP) and dark photon are
involved in the same vertex with photon. Although ALP or dark photon alone
cannot explain muon $g-2$, since the former provides only negative contribution
while the latter has very much constrained parameter space, dark axion portal
can save the situation and significantly extend the allowed parameter space.
The observed muon anomalous magnetic moment provides a robust probe of the dark
axion portal scenario.

High Energy Physics - Phenomenology;High Energy Physics - Experiment