Jiangmen Neutrino Experiment achieves high precision measurement of two key parameters

According to the Institute of High Energy Physics of the Chinese Academy of Sciences, Chinese researchers have completed high-precision measurements of two neutrino oscillation parameters by analyzing 59 days of valid data using the large scientific facility - the Jiangmen Neutrino Experiment. The precision has increased by 1.6 times compared to the combined results of experiments over the past few decades. Neutrinos are known as "ghost particles" and are one of the most difficult particles to capture in the universe. The Jiangmen Neutrino Experiment, located in Jiangmen City, Guangdong Province, is a large scientific facility built to detect these "ghost particles". After more than a decade of design and construction, the Jiangmen Neutrino Experiment officially started operation in August 2025. With the accumulation of data, a large number of new achievements will be released gradually, revealing new mysteries of neutrinos step by step. It is reported that the related research paper was published on June 10 in the international academic journal "Nature" in the form of a cover article. The reviewers commented: "This achievement verifies the reliability of the performance and analysis methods of the Jiangmen Neutrino Experiment, and has direct significance for testing the three-generation neutrino oscillation framework, global oscillation data fitting, and determining the neutrino mass hierarchy in the future."