ABSTRACT
Dark photons have emerged as promising candidates for dark matter, and their search is a toppriority in particle physics, astrophysics, and cosmology. We report the first use of a tunable niobiumsuperconducting radio-frequency cavity for a scan search of dark photon dark matter with innovativedata analysis techniques. We mechanically adjusted the resonant frequency of a cavity submergedin liquid helium at a temperature of 2 K, and scanned the dark photon mass over a frequency rangeof 1.37 MHz centered at 1.3 GHz. Our study leveraged the superconducting radio-frequency cavity’sremarkably high quality factors of approximately 1010, resulting in the most stringent constraintsto date on a substantial portion of the exclusion parameter space on the kinetic mixing coefficientϵ between dark photons and electromagnetic photons, yielding a value of ϵ < 2.2 × 10^(-16).
BIOGRAPHY
Jing Shu is a Boya Distinguished Professor at the School of Physics, Peking University. In 2012, he was selected as young overseas high-level talent and returned to China. In 2019, for his leading research on the breaking of fundamental symmetries in particle physics and cosmology, he received the Asian Achievement Award from the Global Chinese Society of Physics and Astronomy. In 2020, he received funding from the National Science Fund for Distinguished Young Scholars.
Jing Shu has long been engaged in research on particle physics and cosmology. He has made a series of influential and original contributions in several areas, including Higgs physics, early universe phase transitions, matter-antimatter asymmetry, dark matter, and methods in quantum field theory. According to the INSPIRE high-energy physics database, he has published over 90 papers, including in Nature Communications, Nature Astronomy and Physical Review Letters. The total citation is more than 5,000 times.
Date & Time
Venue
Chair