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. 2022 Nov 11;129(20):201301.
doi: 10.1103/PhysRevLett.129.201301.

Search for 70 μeV Dark Photon Dark Matter with a Dielectrically Loaded Multiwavelength Microwave Cavity

R Cervantes  1 , G Carosi  2 , C Hanretty  1 , S Kimes  1 , B H LaRoque  3 , G Leum  1 , P Mohapatra  1 , N S Oblath  3 , R Ottens  1 , Y Park  1 , G Rybka  1 , J Sinnis  1 , J Yang  1
Affiliations

Search for 70 μeV Dark Photon Dark Matter with a Dielectrically Loaded Multiwavelength Microwave Cavity

R Cervantes et al. Phys Rev Lett. .

Abstract

Microwave cavities have been deployed to search for bosonic dark matter candidates with masses of a few μeV. However, the sensitivity of these cavity detectors is limited by their volume, and the traditionally employed half-wavelength cavities suffer from a significant volume reduction at higher masses. Axion dark matter experiment (ADMX)-Orpheus mitigates this issue by operating a tunable, dielectrically loaded cavity at a higher-order mode, which allows the detection volume to remain large. The ADMX-Orpheus inaugural run excludes dark photon dark matter with kinetic mixing angle χ>10^{-13} between 65.5 μeV (15.8 GHz) and 69.3 μeV (16.8 GHz), marking the highest-frequency tunable microwave cavity dark matter search to date.

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