Four-neutrino analysis of 1.5km-baseline reactor antineutrino oscillations

Abstract

The masses of sterile neutrinos are not yet known, and depending on the orders of magnitudes, their existence may explain reactor anomalies or the spectral shape of reactor neutrino events at 1.5km-baseline detector. Here, we present four-neutrino analysis of the results announced by RENO and Daya Bay, which performed the definitive measurements of ${\theta }_{13}$ based on the disappearance of reactor antineutrinos at km-order baselines. Our results using 3+1 scheme include the exclusion curve of $\Delta m_{41}^2$ vs. ${\theta }_{14}$ and the adjustment of ${\theta }_{13}$ due to correlation with ${\theta }_{14}$. The value of ${\theta }_{13}$ obtained by RENO and Daya Bay with a three-neutrino oscillation analysis is included in the $1\sigma$ interval of ${\theta }_{13}$ allowed by our four-neutrino analysis.

arXiv comment14 pages, 7 figures. arXiv admin note: text overlap with arXiv:1303.6173

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• Light sterile neutrinos
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• Light Sterile Neutrinos: Status and Perspectives
• Assessing the role of nuclear effects in the interpretation of the MiniBooNE low-energy anomaly
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• Deviations in Tribimaximal Mixing From Sterile Neutrino Sector
• $B-L$ model with $A_4\times Z_3\times Z_4$ symmetry for $3+1$ active$-$sterile neutrino mixing
• New mixing schemes for (3+1) neutrinos
• Lepton masses and mixings, and muon anomalous magnetic moment in an extended $B-L$ model with type I seesaw mechanism
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• Unparticle Decay of Neutrinos and its Possible Signatures at a ${\mathrm{Km}}^2$ Detector for (3+1) Flavour Framework