Combined fit to 839048 atmospheric neutrino events from three experiments plus reactor data yields competitive mixing parameters with preference for normal mass ordering.
Westeret al.(Super-Kamiokande), Atmospheric neu- trino oscillation analysis with neutron tagging and an ex- panded fiducial volume in Super-Kamiokande I–V, Phys
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Super-Kamiokande measures the flux-averaged muon neutrino and antineutrino charged-current cross section at 500-5000 GeV as (0.51 ± 0.11) × 10^{-38} cm² GeV^{-1}.
Proposes a new up-down flux ratio for sub-GeV atmospheric neutrinos to measure δ_CP, potentially exceeding T2HK sensitivity near 90° and 270° at Hyper-Kamiokande.
Inelasticity and neutron multiplicity distributions differ between neutrino and antineutrino charged-current events in liquid scintillator, enabling quantitative discrimination for atmospheric oscillation studies.
SO(10)-inspired leptogenesis implies N2-leptogenesis, ruling out inverted neutrino ordering under strict conditions and enabling initial-condition-independent asymmetry in subsets of solutions.