Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment

(RENO Collaboration)

doi:10.1103/PhysRevLett.116.211801

Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment

(RENO Collaboration)

Department of Physics

Research output: Contribution to journal › Article › peer-review

212 Scopus citations

Abstract

The RENO experiment has analyzed about 500 live days of data to observe an energy dependent disappearance of reactor νe by comparing their prompt signal spectra measured in two identical near and far detectors. In the period between August of 2011 and January of 2013, the far (near) detector observed 31 541 (290 775) electron antineutrino candidate events with a background fraction of 4.9% (2.8%). The measured prompt spectra show an excess of reactor νe around 5 MeV relative to the prediction from a most commonly used model. A clear energy and baseline dependent disappearance of reactor νe is observed in the deficit of the observed number of νe. Based on the measured far-to-near ratio of prompt spectra, we obtain sin22θ13=0.082±0.009(stat)±0.006(syst) and |Δmee2|=[2.62-0.23+0.21(stat)-0.13+0.12(syst)]×10-3 eV2.

Original language	English
Article number	211801
Journal	Physical Review Letters
Volume	116
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.116.211801
State	Published - 24 May 2016

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10.1103/PhysRevLett.116.211801

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@article{54a8bd38081b47a8a0ead57c061ed263,

title = "Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment",

abstract = "The RENO experiment has analyzed about 500 live days of data to observe an energy dependent disappearance of reactor νe by comparing their prompt signal spectra measured in two identical near and far detectors. In the period between August of 2011 and January of 2013, the far (near) detector observed 31 541 (290 775) electron antineutrino candidate events with a background fraction of 4.9\% (2.8\%). The measured prompt spectra show an excess of reactor νe around 5 MeV relative to the prediction from a most commonly used model. A clear energy and baseline dependent disappearance of reactor νe is observed in the deficit of the observed number of νe. Based on the measured far-to-near ratio of prompt spectra, we obtain sin22θ13=0.082±0.009(stat)±0.006(syst) and |Δmee2|=[2.62-0.23+0.21(stat)-0.13+0.12(syst)]×10-3 eV2.",

author = "\{(RENO Collaboration)\} and Choi, \{J. H.\} and Choi, \{W. Q.\} and Y. Choi and Jang, \{H. I.\} and Jang, \{J. S.\} and Jeon, \{E. J.\} and Joo, \{K. K.\} and Kim, \{B. R.\} and Kim, \{H. S.\} and Kim, \{J. Y.\} and Kim, \{S. B.\} and Kim, \{S. Y.\} and W. Kim and Kim, \{Y. D.\} and Y. Ko and Lee, \{D. H.\} and Lim, \{I. T.\} and Pac, \{M. Y.\} and Park, \{I. G.\} and Park, \{J. S.\} and Park, \{R. G.\} and H. Seo and Seo, \{S. H.\} and Seon, \{Y. G.\} and Shin, \{C. D.\} and K. Siyeon and Yang, \{J. H.\} and Yeo, \{I. S.\} and I. Yu",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = may,

day = "24",

doi = "10.1103/PhysRevLett.116.211801",

language = "English",

volume = "116",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "21",

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TY - JOUR

T1 - Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment

AU - (RENO Collaboration)

AU - Choi, J. H.

AU - Choi, W. Q.

AU - Choi, Y.

AU - Jang, H. I.

AU - Jang, J. S.

AU - Jeon, E. J.

AU - Joo, K. K.

AU - Kim, B. R.

AU - Kim, H. S.

AU - Kim, J. Y.

AU - Kim, S. B.

AU - Kim, S. Y.

AU - Kim, W.

AU - Kim, Y. D.

AU - Ko, Y.

AU - Lee, D. H.

AU - Lim, I. T.

AU - Pac, M. Y.

AU - Park, I. G.

AU - Park, J. S.

AU - Park, R. G.

AU - Seo, H.

AU - Seo, S. H.

AU - Seon, Y. G.

AU - Shin, C. D.

AU - Siyeon, K.

AU - Yang, J. H.

AU - Yeo, I. S.

AU - Yu, I.

PY - 2016/5/24

Y1 - 2016/5/24

N2 - The RENO experiment has analyzed about 500 live days of data to observe an energy dependent disappearance of reactor νe by comparing their prompt signal spectra measured in two identical near and far detectors. In the period between August of 2011 and January of 2013, the far (near) detector observed 31 541 (290 775) electron antineutrino candidate events with a background fraction of 4.9% (2.8%). The measured prompt spectra show an excess of reactor νe around 5 MeV relative to the prediction from a most commonly used model. A clear energy and baseline dependent disappearance of reactor νe is observed in the deficit of the observed number of νe. Based on the measured far-to-near ratio of prompt spectra, we obtain sin22θ13=0.082±0.009(stat)±0.006(syst) and |Δmee2|=[2.62-0.23+0.21(stat)-0.13+0.12(syst)]×10-3 eV2.

AB - The RENO experiment has analyzed about 500 live days of data to observe an energy dependent disappearance of reactor νe by comparing their prompt signal spectra measured in two identical near and far detectors. In the period between August of 2011 and January of 2013, the far (near) detector observed 31 541 (290 775) electron antineutrino candidate events with a background fraction of 4.9% (2.8%). The measured prompt spectra show an excess of reactor νe around 5 MeV relative to the prediction from a most commonly used model. A clear energy and baseline dependent disappearance of reactor νe is observed in the deficit of the observed number of νe. Based on the measured far-to-near ratio of prompt spectra, we obtain sin22θ13=0.082±0.009(stat)±0.006(syst) and |Δmee2|=[2.62-0.23+0.21(stat)-0.13+0.12(syst)]×10-3 eV2.

UR - https://www.scopus.com/pages/publications/84971224792

U2 - 10.1103/PhysRevLett.116.211801

DO - 10.1103/PhysRevLett.116.211801

M3 - Article

AN - SCOPUS:84971224792

SN - 0031-9007

VL - 116

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

M1 - 211801

ER -

Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment

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