First Search for Dark Photon Dark Matter with a madmax Prototype

Author(s): J. Egge et al. (madmax Collaboration) We report the first result from a dark photon dark matter search in the mass range from 78.62 to $83.95\text{ }\text{ }\mathrm{μ}\mathrm{eV}/{c}^{2}$ with a dielectric haloscope prototype for madmax (Magnetized Disc and Mirror Axion eXperiment). Putative dark photons would convert to detectable phot… [Phys. Rev. Lett. 134, 151004] Published Fri Apr 18, 2025