First Scan Search for Dark Photon Dark Matter with a Tunable Superconducting Radio-Frequency Cavity

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,Fang Wang,Huamu Xie,Senlin Huang,Jing Shu

Physical Review Letters（2024）

Peking Univ | Univ Chinese Acad Sci | Niels Bohr Inst | Chinese Acad Sci | Beijing Acad Quantum Informat Sci

Cited 2|Views37

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. Published by the American Physical Society 2024

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