Papers › Back to (Mass-)Square(d) One: The Neutrino Mass Ordering in Light of Recent Data
Back to (Mass-)Square(d) One: The Neutrino Mass Ordering in Light of Recent Data
Kevin J. Kelly, Pedro A. N. Machado, Stephen J. Parke, Yuber F. Perez-Gonzalez, Renata Zukanovich Funchal
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We inspect recently updated neutrino oscillation data -- specifically coming from the Tokai to Kamioka and NuMI Off-axis νₑ Appearance experiments -- and how they are analyzed to determine whether the neutrino mass ordering is normal (m₁ < m₂ < m₃) or inverted (m₃ < m₁ < m₂). We show that, despite previous results giving a strong preference for the normal ordering, with the newest data from T2K and NOvA, this preference has all but vanished. Additionally, we highlight the importance of this result for non-oscillation probes of neutrinos, including neutrinoless double beta decay and cosmology. Future experiments, including JUNO, DUNE, and T2HK will provide valuable information and determine the mass ordering at a high confidence level.
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