论文标题
对波浪般的深色光子暗物质的最深敏感性以及超导射频腔
Deepest sensitivity to wavelike dark photon dark matter with superconducting radio frequency cavities
论文作者
论文摘要
可以使用称为卤素的微波腔检测到波浪，玻色粒暗候选轴和暗光子。传统上，卤素由在TM $ _ {010} $模式下运行的可调铜腔组成，但欧姆损失限制了其性能。相比之下，超导射频（SRF）腔可以达到$ \ sim 10^{10} $的质量因子，也许比铜腔更好五个数量级，从而导致更敏感的暗物质探测器。在本文中，我们首先得出了卤素实验的扫描速率与加载质量因子$ q_l $成正比，即使腔带宽比暗物质晕线线窄得多。然后，我们使用非untundoble Ultrahigh质量SRF腔进行了概念验证搜索。我们排除了深色光子暗物质，具有$χ> 1.5 \ times 10^{ - 16} $的动力学混合强度，对于$ m_ {a^{\ prime}} =5.35μ$ eV的深色光子质量，实现了几乎最大的范围的深色光子。
Wavelike, bosonic dark matter candidates like axions and dark photons can be detected using microwave cavities known as haloscopes. Traditionally, haloscopes consist of tunable copper cavities operating in the TM$_{010}$ mode, but ohmic losses have limited their performance. In contrast, superconducting radio frequency (SRF) cavities can achieve quality factors of $\sim 10^{10}$, perhaps five orders of magnitude better than copper cavities, leading to more sensitive dark matter detectors. In this paper, we first derive that the scan rate of a haloscope experiment is proportional to the loaded quality factor $Q_L$, even if the cavity bandwidth is much narrower than the dark matter halo line shape. We then present a proof-of-concept search for dark photon dark matter using a nontunable ultrahigh quality SRF cavity. We exclude dark photon dark matter with kinetic mixing strengths of $χ> 1.5\times 10^{-16}$ for a dark photon mass of $m_{A^{\prime}} = 5.35μ$eV, achieving the deepest exclusion to wavelike dark photons by almost an order of magnitude.
