Search for Sub-eV Sterile Neutrino at RENO

Abstract

We report a search result for a light sterile neutrino oscillation with roughly 2200 live days of data in the RENO experiment. The search is performed by electron antineutrino (${\overline{\nu }}_e$) disappearance taking place between six 2.8 GW${}_{\text{th}}$ reactors and two identical detectors located at 294 m (near) and 1383 m (far) from the center of reactor array. A spectral comparison between near and far detectors can explore reactor ${\overline{\nu }}_e$ oscillations to a light sterile neutrino. An observed spectral difference is found to be consistent with that of the three-flavor oscillation model. This yields limits on ${\sin }^{2}2{\theta }_{14}$ in the $10^{-4}\lesssim |\Delta m_{41}^2|\lesssim 0.5$ eV${}^2$ region, free from reactor ${\overline{\nu }}_e$ flux and spectrum uncertainties. The RENO result provides the most stringent limits on sterile neutrino mixing at $|\Delta m_{41}^2|\lesssim 0.002$ eV${}^2$ using the ${\overline{\nu }}_e$ disappearance channel.

References in corpus (5)

• The Reactor Antineutrino Anomaly
• Measurement of the solar neutrino capture rate with gallium metal. III: Results for the 2002--2007 data-taking period
• Statistical Significance of the Gallium Anomaly
• Sterile neutrino search at NEOS Experiment
• Improved Constraints on Sterile Neutrino Mixing from Disappearance Searches in the MINOS, MINOS+, Daya Bay, and Bugey-3 Experiments

Cited by in corpus (14)

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• Search for Signatures of Sterile Neutrinos with Double Chooz
• Review of sterile neutrino searches at very short-baseline reactor experiments
• Status of Anomalies and Sterile Neutrino Searches at Nuclear Reactors
• Measurements using a prototype array of plastic scintillator bars for reactor based electron anti-neutrino detection
• Evaluation of the response of plastic scintillator bars and measurement of neutron capture time in non-reactor environment for the ISMRAN experiment
• Improved FIFRELIN de-excitation model for neutrino applications
• Characterization of plastic scintillator bars using fast neutrons from D-D and D-T reactions
• Sensitivity of Hyper-Kamiokande to sub-eV Sterile Neutrinos
• The eV-Scale Sterile Neutrino and Neutrinoless Double Beta Decay
• Proposal: JSNS${}^2$-II