Abstract
Neutrino oscillations involving eV-scale neutrino mass states are investigated in the context of global neutrino oscillation data including short and long-baseline accelerator, reactor, and radioactive source experiments, as well as atmospheric and solar neutrinos. We consider sterile neutrino mass schemes involving one or two mass-squared differences at the eV2 scale denoted by 3+1, 3+2, and 1+3+1. We discuss the hints for eV-scale neutrinos from \( \mathop{{{v_e}}}\limits^{{\left( - \right)}} \) disappearance (reactor and Gallium anomalies) and \( \mathop{{{v_{\mu }}}}\limits^{{\left( - \right)}}\to \mathop{{{v_e}}}\limits^{{\left( - \right)}} \) appearance (LSND and MiniBooNE) searches, and we present constraints on sterile neutrino mixing from \( \mathop{{{v_{\mu }}}}\limits^{{\left( - \right)}} \) and neutral-current disappearance data. An explanation of all hints in terms of oscillations suffers from severe tension between appearance and disappearance data. The best compatibility is obtained in the 1+3+1 scheme with a p-value of 0.2% and exceedingly worse compatibilities in the 3+1 and 3+2 schemes.
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Kopp, J., Machado, P.A.N., Maltoni, M. et al. Sterile neutrino oscillations: the global picture. J. High Energ. Phys. 2013, 50 (2013). https://doi.org/10.1007/JHEP05(2013)050
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DOI: https://doi.org/10.1007/JHEP05(2013)050
Keywords
- Beyond Standard Model
- Neutrino Physics
- Solar and Atmospheric Neutrinos