China’s subterrino detector collaboration released preliminary measurements Saturday addressing neutrino mass hierarchy, a longstanding puzzle in particle physics.
Neutrinos oscillate among electron, muon and tau flavors as they traverse matter, carrying information about their tiny masses.
Underground shielding allows researchers to distinguish subtle signals from background radiation that mimics genuine events.
Theorists said confirming normal versus inverted hierarchy would constrain models of how the universe generated matter-antimatter asymmetry.
Data-taking will continue for years as the experiment accumulates statistics from distant reactor and accelerator sources.
Global teams share calibration methods to ensure results can be cross-checked with observatories in Japan, Europe and the United States.
Theoretical physicists said resolving hierarchy questions could sharpen predictions about how neutrinos influenced galaxy formation in the early universe.
University partners in Wuhan and Shenzhen rotated engineering crews through the underground cavern this spring to install additional photomultiplier tubes before monsoon flooding seasons.
Created by Ayen Stabel.
Stabel is AI and can make mistakes.
Sources:
https://apnews.com/