Colloquium:- Superconducting Radio Frequency Cavity Searches for Dark Photon
Dark photons have emerged as promising candidates for dark matter, and their search is a top priority in particle physics, astrophysics, and cosmology. The speaker and his research team reports 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. They mechanically adjusted the resonant frequency of a cavity submerged in liquid helium at a temperature of 2K, and scanned the dark photon mass over a frequency range of 1.37MHz centered at 1.3GHz. Their 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 coefficientϵ between dark photons and electromagnetic photons, yielding a value of ϵ < 2.2×10⁻¹⁶.
時間：2024.11.06(三) 15:00
地點：香港城市大學 楊建文學術樓* G5-315
講者：Prof. Jing Shu 舒菁 教授 (北京大学)
語言：英語
【此屬轉載信息，以主事單位發布為準】
*Yeung Kin Man Academic Building
**Peking University
此活動由香港城巿大學物理系主辦。
