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| Journal Article | PUBDB-2025-01783 |
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2025
APS
College Park, Md.
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Please use a persistent id in citations: doi:10.1103/PhysRevLett.134.151004 doi:10.3204/PUBDB-2025-01783
Abstract: We report the first result from a dark photon dark matter search in the mass range from 78.62 to 83.95 μeV/𝑐$^2$ with a dielectric haloscope prototype for madmax (Magnetized Disc and Mirror Axion eXperiment). Putative dark photons would convert to detectable photons within a stack consisting of three sapphire disks and a mirror. The emitted power of this system is received by an antenna and successively digitized using a low-noise receiver. No significant signal attributable to dark photons has been observed above the expected background. Assuming unpolarized dark photon dark matter with a local density of $𝜌_𝜒$=0.3 GeV cm$^3$ we exclude a dark photon to photon mixing parameter 𝜒 >2.7 ×10$^{−12}$ over the full mass range and 𝜒 >1.1 ×10$^{−13}$ at a mass of 80.57 μeV/𝑐$^2$ with a 95% confidence level. This is the first physics result from a madmax prototype and exceeds previous constraints on 𝜒 in this mass range by up to almost three orders of magnitude.
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