加强基础研究战略性、前瞻性、体系化布局，提高基础研究投入比重，加大长期稳定支持。 江门中微子实验是一个国际合作项目，来自17个国家和地区的700多名科研人员参与其中。欧洲团 队贡献了不少探测器部件，泰国、巴基斯坦等国家的团队也深度参与，这种跨越国界的科研合作，让我 们深深感到了"科学无国界"。 2025年11月19日，我们发布了首个物理成果。通过数据分析，我们将中微子振荡参数的测量精度提 高了1.5到1.8倍。这个结果证明，探测器的性能完全符合设计预期。这只是一个开始——未来3到5年， 我们有望将测量精度提升到更高水平。 有人问，中微子研究离日常生活那么远，为什么要投入这么多资源？我觉得，基础科学研究的价值 往往需要时间来证明。中微子研究不仅能够帮助我们理解宇宙的基本规律，还可能在未来带来意想不到 的发现。比如，通过探测地球中微子，我们可以分析地壳和地幔中的放射性元素含量；通过捕捉超新星 中微子，能研究恒星爆发的机制。这些研究正在为地球科学和天体物理开辟新的方向。展望"十五五"， 我们将继续聚焦中微子质量顺序这个核心问题，同时拓展地球中微子、超新星中微子等交叉研究。 ——摘自"十五五"规划建议 2025年8月 ...

Core Insights - The Jiangmen Underground Neutrino Observatory (JUNO) has achieved its first physical results, measuring two parameters related to neutrino oscillation with an accuracy improved by 1.5 to 1.8 times compared to previous experiments [2][3] - The JUNO project, proposed by the Chinese Academy of Sciences in 2008, officially commenced operations on August 26, 2023, and is recognized as the world's first large-scale, high-precision neutrino experiment [2] - The project involves over 700 researchers from 75 institutions across 17 countries and regions, showcasing China's commitment to international scientific collaboration [2] Project Details - The JUNO collaboration has successfully analyzed data from August 26 to November 2, 2023, leading to the high-precision measurement of solar neutrino oscillation parameters [3] - The performance of the JUNO detector has met or exceeded design expectations, allowing for rapid determination of neutrino mass ordering and testing of the three types of neutrino oscillation frameworks [3] - The success of JUNO is seen as a significant milestone reflecting the dedication and creativity of the international team involved in the project [3]

Core Insights - The Jiangmen Underground Neutrino Observatory (JUNO) has successfully completed its construction and announced its first scientific results, measuring solar neutrino oscillation parameters with an accuracy improved by 1.5 to 1.8 times compared to previous experiments [1][4][6]. Group 1: Project Overview - JUNO is the first large-scale, high-precision neutrino experiment of its kind, designed to detect elusive neutrinos, often referred to as "ghost particles" [1][3]. - The project is a significant international collaboration involving over 700 researchers from 75 institutions across 17 countries and regions [8][11]. - The observatory is set to officially begin data collection on August 26, 2025, after a series of construction and installation phases that began in 2008 [11]. Group 2: Scientific Achievements - The first physical results from JUNO were derived from data collected over 59 days, confirming the solar neutrino oscillation parameters and addressing the previously noted "solar neutrino anomaly" [6][9]. - The experiment's design allows for simultaneous measurement of both solar and reactor neutrinos, which could provide insights into new physics beyond the current particle physics framework [6][11]. - The core detector, with an effective mass of 20,000 tons, is designed to achieve unprecedented sensitivity in neutrino detection, focusing on neutrino mass ordering and oscillation parameters [11]. Group 3: Future Prospects - JUNO is expected to produce significant scientific results over the next few decades and contribute to the training of a new generation of physicists [11]. - The facility has a design lifespan of 30 years and can be upgraded to become the world's most sensitive experiment for neutrinoless double beta decay, potentially probing the absolute mass of neutrinos [11].

Core Insights - The Jiangmen Neutrino Experiment has successfully measured two parameters describing neutrino oscillation with a precision 1.5-1.8 times better than previous experiments, marking a significant advancement in neutrino research [1][2] - The experiment's performance has met or exceeded design expectations, bringing humanity closer to determining the mass hierarchy of neutrinos [1] Group 1: Experiment Overview - The Jiangmen Neutrino Experiment is designed to capture "ghost particles" known as neutrinos, utilizing a detector that contains 20,000 tons of liquid scintillator housed in the world's largest organic glass sphere, increasing the volume by 20 times compared to existing facilities [2] - The experiment has been operational for two months, analyzing data from August 26 to November 2, totaling 59 days of effective data collection [1] Group 2: Scientific Significance - Neutrinos are fundamental particles that play a crucial role in understanding the evolution of the universe, yet they are extremely difficult to detect due to their minuscule mass and weak interaction with matter [1] - The project team aims to collaborate closely with global scientists to produce original scientific results with significant impact [3]

Core Insights - The Jiangmen Neutrino Experiment has officially commenced operations, marking a significant milestone in scientific research [1] - The experiment confirmed the existence of the solar neutrino anomaly, achieving a measurement precision improvement of 1.5 to 1.8 times compared to previous international experiments [3][5] - The primary scientific goal is to resolve a major issue in particle physics: the mass ordering of neutrinos, which could open new avenues for exploring the unknown physical world [5] Experiment Overview - The Jiangmen Neutrino Experiment was proposed by the Institute of High Energy Physics, Chinese Academy of Sciences in 2008, with construction starting in 2015 and completion in December 2021 [8] - The core detector has an effective mass of 20,000 tons and is located 44 meters underground, featuring a stainless steel shell and various key components for detecting neutrino interactions [8] Future Prospects - As the world's first large-scale, high-precision neutrino facility, the Jiangmen Neutrino Experiment is expected to facilitate cutting-edge research on neutrinos from various cosmic sources [11] - The facility has a design lifespan of 30 years and can be upgraded to become the most sensitive experiment for neutrinoless double beta decay, potentially addressing critical questions in particle physics, astrophysics, and cosmology [11]