International survey of coherent elastic neutrino-nucleus scattering experiments and the CDEX-RECODE experiment

<p indent="0mm">Coherent elastic neutrino-nucleus scattering (CEνNS) is a fundamental neutrino-matter interaction predicted by the Standard Model, in which neutrinos elastically scatter off entire atomic nuclei. Detection of CEνNS not only enables researchers to verify the Standard Model but also provides opportunities to explore physics beyond it. Furthermore, CEνNS measurements could potentially offer new approaches for real-time reactor monitoring and detection of solar and supernova neutrinos. CEνNS will also emerge as a significant background source for next-generation dark matter direct detection experiments. Given its importance, CEνNS detection has become a frontier topic in neutrino physics, with numerous detection experiments currently operating or under development worldwide. However, the extremely low cross section of CEνNS poses significant challenges for detector threshold and background requirements. The CDEX-RECODE experiment, a reactor neutrino CEνNS detection experiment utilizing high purity germanium detectors, is scheduled to operate at the Sanmen Nuclear Power Plant in Zhejiang, China. With its projected energy threshold of approximately 160 eVee (1 keVnr), the low-energy background of less than 2 cpkkd, and exceptional long-term stability, CDEX-RECODE holds significant advantages among similar experiments. This review surveys the current landscape of CEνNS detection experiments worldwide and discusses the future prospects of the CDEX-RECODE experiment in China.