Core Insights - The Jiangmen Neutrino Experiment (JUNO) has successfully constructed its experimental facility and announced its first physical results, confirming the "solar neutrino anomaly" with the highest precision to date, suggesting potential new physics beyond the standard model [2][3] Group 1: Experimental Achievements - The experiment, located 700 meters underground, captured over 2,300 neutrinos between August 26 and November 2, 2025, achieving a measurement precision of the solar neutrino oscillation parameters that is 1.5 to 1.8 times better than previous experiments [2] - The experiment's detector performance indicators have met or exceeded design expectations, indicating readiness for cutting-edge neutrino physics research [3] Group 2: Historical Context and Development - The concept for the Jiangmen Neutrino Experiment was proposed by the Institute of High Energy Physics in 2008, receiving support from the Chinese Academy of Sciences and the Guangdong provincial government in 2013 [3] - The construction of the underground laboratory began in 2015, with the completion of the laboratory and installation of the detector achieved by December 2021, and the detector construction expected to be completed by December 2024 [3] Group 3: Technical Specifications - The core detector consists of a 20,000-ton liquid scintillator, housed in a 41.1-meter diameter stainless steel shell, with a central water pool 44 meters deep [3][5] - The detection system includes 20,000 20-inch photomultiplier tubes and 25,000 3-inch photomultiplier tubes, contributing to its high sensitivity [5]
【中国新闻网】中国江门中微子实验发布首个成果 高精度证实暗示新物理的偏差
Zhong Guo Xin Wen Wang·2025-11-19 06:03