Theory 102/New facility/Particle physics
Mass Ordering Needs Baseline
The claim
The ordering of neutrino masses requires a long baseline because the matter effect that distinguishes the orderings accumulates with distance.
01Mechanism
Matter effects grow with path length; short baselines cannot separate the cases.
02Prediction
Sensitivity should scale with baseline.
03Refutation
Ordering resolvable at short baseline would remove the need.