Axion Dark Matter Coupling to Resonant Photons via Magnetic Field

Understand

We show that the magnetic component of the photon field produced by dark matter axions via the two-photon coupling mechanism in a Sikivie Haloscope is an important parameter passed over in previous analysis and experiments.

• The interaction of the produced photons will be resonantly enhanced as long as they couple to the electric or magnetic mode structure of the Haloscope cavity.
• For typical Haloscope experiments the electric and magnetic coupling is the same and implicitly assumed in past sensitivity calculations.
• However, for future planned searches such as those at high frequency, which synchronize multiple cavities, the sensitivity will be altered due to different magnetic and electric couplings.