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Extracting mass hierarchy information from simple analysis of neutrino mass splitting

School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, P. R. China

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Bo-Qiang Ma

School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, P. R. China

Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China

Center for High Energy Physics, Peking University, Beijing 100871, P. R. China

Corresponding author

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https://doi.org/10.1142/S0217732314500965Cited by:0 (Source: Crossref)

Abstract

Based on the independent measurements on neutrino mass splitting , and recent measurements by the T2K Collaboration, we carry out a simple fitting analysis on and in normal hierarchy and inverted hierarchy respectively, suggesting and in normal hierarchy, or and in inverted hierarchy. The simple analysis indicate that both normal and inverted hierarchies are consistent with current experimental measurements on mass splitting. The p-value for normal hierarchy and that for inverted hierarchy are 62% and 55%, respectively. This reveals a slight favor for the normal hierarchy. It is suggested that further measurements on the mass splitting with higher accuracy are necessary to determine the neutrino mass hierarchy.

Keywords:

PACS: 14.60.Pq, 12.15.Ff, 14.60.Lm

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