2020/06/14 by The RENO Collaboration, J. H. Choi, H. I. Jang +28 · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Computer science #Detector #Flux (metallurgy) #License #Mixing (physics) #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Optics #Oscillation (cell signaling) #Particle physics #Particle physics theoretical and experimental studies #Physics #Sterile neutrino #hep-ex
paper · pdf · doi:10.1103/physrevlett.125.191801
published as Phys. Rev. Lett. 125, 191801 (2020)
arxiv created 2020/06/14 · openalex publication_date 2020/11/06 · arxiv updated 2020/11/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 (\ensuremathνe) disappearance taking place between six 2.8 GWth reactors and two identical detectors located at 294 m (near) and 1383 m (far) from the center of the reactor array. A spectral comparison between near and far detectors can explore reactor \ensuremathνe 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 sin22\ensuremathθ14 in the 10^\ensuremath-4\ensuremath\lesssim|\mathrm\ensuremathΔm412|\ensuremath\lesssim0.5 eV2 region, free from reactor \ensuremathνe flux and spectrum uncertainties. The RENO result provides the most stringent limits on sterile neutrino mixing at |\mathrm\ensuremathΔm412|\ensuremath\lesssim0.002 eV2 using the \ensuremathνe disappearance channel.