Physicists in China announced initial science results Saturday from a massive underground neutrino observatory designed to detect nearly massless particles passing through rock.
The facility shields sensitive tanks from cosmic-ray noise that would overwhelm surface detectors.
First data releases focus on oscillation patterns as neutrinos change flavor across long baselines, testing whether the three known types fully explain observed behavior.
Collaborators said precise measurements could resolve ordering of neutrino masses, a question with implications for cosmology and particle theory.
Construction required years of excavation and ultra-clean materials to prevent radioactive contamination inside water volumes.
International peers praised the milestone while awaiting peer-reviewed publications detailing systematic uncertainties.
Graduate students involved in calibration shifts said working underground requires multi-day rotations because cosmic-ray muons still penetrate shallow tunnels.
Funding agencies in Beijing framed the detector as a flagship comparable to Europe’s underground laboratories, signaling sustained support for fundamental physics even amid trade tensions.
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Sources:
https://apnews.com/