First Scan Search for Dark Photon Dark Matter with a Tunable Superconducting Radio-Frequency Cavity
SHANHE Collaboration, Zhenxing Tang, Bo Wang, Yifan Chen, Yanjie Zeng, Chunlong Li, Yuting Yang, Liwen Feng, Peng Sha, Zhenghui Mi, Weimin Pan, Tianzong Zhang, Yirong Jin, Jiankui Hao, Lin Lin, Fang Wang, Huamu Xie, Senlin Huang, Jing Shu
DOI 10.1103/PhysRevLett.133.021005 · Physical Review Letters
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Abstract
Dark photons have emerged as promising candidates for dark matter, and their search is a top priority in particle physics, astrophysics, and cosmology. We report the first use of a tunable niobium superconducting radio-frequency cavity for a scan search of dark photon dark matter with innovative data analysis techniques. We mechanically adjusted the resonant frequency of a cavity submerged in liquid helium at a temperature of 2 K, and scanned the dark photon mass over a frequency range of 1.37 MHz centered at 1.3 GHz. Our study leveraged the superconducting radio-frequency cavity’s remarkably high quality factors of approximately 1010, resulting in the most stringent constraints to date on a substantial portion of the exclusion parameter space on the kinetic mixing coefficient ε between dark photons and electromagnetic photons, yielding a value of ε<2.2×10−16.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.25 | Pressure not reported | unknown |
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