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The neutrino mass hierarchy and absolute mass scale are not fully resolved.

open Global / Unspecified, Global WS01822
Oscillation experiments show mixing but leave ordering and scale uncertain. Next-generation beta-decay and cosmological probes can answer these questions.
Added by: Ian Patel
Created at: 2026-07-22T15:14:00Z
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WS01822 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=1822

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