江门中微子实验发布首个重大科学成果

Core Insights - The Jiangmen Neutrino Experiment has achieved significant scientific results by measuring two key parameters of neutrino oscillation with a precision improvement of 1.5 to 1.8 times compared to the previous best international levels, surpassing over a decade of efforts from similar foreign experiments [1][2] Group 1: Experiment Overview - The Jiangmen Neutrino Experiment, located 700 meters underground in Guangdong, officially began operations on August 26 and is the world's first next-generation large-scale, high-precision neutrino detection facility [1] - The core detector is equipped with 20,000 tons of liquid scintillator and 45,000 photomultiplier tubes, capable of capturing extremely weak neutrino signals [1] Group 2: Scientific Achievements - Researchers achieved breakthroughs in measuring the two key parameters of neutrino oscillation—mixing angle θ12 and mass-squared difference Δm²₂₁—using only 59 days of effective data from the device [1] - The experiment confirmed the long-standing discrepancy between reactor neutrino and solar neutrino measurements, providing clues for exploring new physical laws [2] Group 3: Future Prospects - The device has a designed lifespan of 30 years and can be upgraded to become the world's most sensitive experiment for neutrinoless double beta decay, exploring whether neutrinos are their own antiparticles [2] - The Jiangmen Neutrino Experiment is a model of international collaboration in large-scale basic scientific research, involving over 700 researchers from 75 institutions across 17 countries [2]