NEW YORK — A massive underground observatory in China has released its first major scientific results, offering new insight into neutrinos, often described by physicists as “ghost particles” because of their ability to pass through matter almost undetected.
The Jiangmen Underground Neutrino Observatory (JUNO), one of the world’s largest and most sensitive neutrino detectors, began collecting data in August and published its initial findings on Wednesday in the journal Nature, according to the research team.
Neutrinos are subatomic particles produced in enormous quantities during cosmic events, including the Big Bang. Trillions pass through the human body every second without interaction. Despite their abundance, they are extremely difficult to detect because they carry almost no mass and interact very weakly with matter.
The JUNO collaboration reported highly precise measurements of how neutrinos change between three known types, or “flavors,” as they travel through space. These transitions are a key focus of modern particle physics, as they may help explain fundamental properties of matter in the universe.
“It really makes me look forward to more exciting results in the future,” said Kate Scholberg, a physicist at Duke University who is not part of the project.
The detector is located about 700 meters underground in southern China to shield it from cosmic radiation and background interference. It observes antineutrinos produced by nearby nuclear power plants, capturing tiny flashes of light generated when these particles interact with the detector’s liquid medium.
While neutrinos remain among the least understood particles in physics, scientists hope JUNO will help resolve one of the field’s major unresolved questions: the exact ordering of neutrino masses. Researchers believe one of the three neutrino types differs in mass from the other two, but it remains unclear whether it is heavier or lighter.
According to study co-author Liangjian Wen of the JUNO collaboration, the early results do not yet solve this question but demonstrate the detector’s precision and scientific potential. He said the system is capable of detecting subtle variations in neutrino behavior that could eventually clarify the mass hierarchy problem.
The JUNO project is part of a broader global effort to study neutrinos. Similar large-scale experiments are under development, including Japan’s Hyper-Kamiokande and the United States’ Deep Underground Neutrino Experiment (DUNE), both expected to begin operations within the next decade. Scientists anticipate that combining results from multiple detectors will help validate findings and deepen understanding of these fundamental particles.
Physicists say neutrino research may ultimately provide clues about the origins of the universe and why matter exists at all.
Edgardo Hernal started college at UP Diliman and received his BA in Economics from San Sebastian College, Manila, and Masters in Information Systems Management from Keller Graduate School of Management of DeVry University in Oak Brook, IL. He has 25 years of copy editing and management experience at Thomson West, a subsidiary of Thomson Reuters.
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