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Spectral Measurement of the Electron Antineutrino Oscillation Amplitude and Frequency using 500 Live Days of RENO Data
- Source :
- Physical Review
- Publication Year :
- 2016
-
Abstract
- The Reactor Experiment for Neutrino Oscillation (RENO) has been taking electron antineutrino ($\overline{\nu}_{e}$) data from the reactors in Yonggwang, Korea, using two identical detectors since August 2011. Using roughly 500 live days of data through January 2013 we observe 290,775 (31,514) reactor $\overline{\nu}_{e}$ candidate events with 2.8 (4.9)% background in the near (far) detector. The observed visible positron spectra from the reactor $\overline{\nu}_{e}$ events in both detectors show discrepancy around 5 MeV with regard to the prediction from the current reactor $\overline{\nu}_{e}$ model. Based on a far-to-near ratio measurement using the spectral and rate information we have obtained $\sin^2 2 \theta_{13} = 0.082 \pm 0.009({\rm stat.}) \pm 0.006({\rm syst.})$ and $|\Delta m_{ee}^2| =[2.62_{-0.23}^{+0.21}({\rm stat.})_{-0.13}^{+0.12}({\rm syst.})]\times 10^{-3}$eV$^2$.<br />Comment: 24 pages, 30 figures. Submitted to PRD. Total detection efficiency change from 76.44% to 76.47%. Some modifications of text to improve readability and clarification of the paper
- Subjects :
- Physics
Particle physics
Physics - Instrumentation and Detectors
010308 nuclear & particles physics
FOS: Physical sciences
Reactor Experiment for Neutrino Oscillation
Instrumentation and Detectors (physics.ins-det)
01 natural sciences
Spectral line
High Energy Physics - Experiment
Nuclear physics
High Energy Physics - Experiment (hep-ex)
0103 physical sciences
Ratio measurement
010306 general physics
Neutrino oscillation
Electron neutrino
Oscillation amplitude
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Physical Review
- Accession number :
- edsair.doi.dedup.....de20a6700c992622d6b2e35f5baec946