Measurement of the Electron Antineutrino Oscillation with 1958 Days of Operation at Daya Bay

(The Daya Bay Collaboration)

Research output: Contribution to journalArticle

Abstract

We report a measurement of electron antineutrino oscillation from the Daya Bay Reactor Neutrino Experiment with nearly 4 million reactor νe inverse β decay candidates observed over 1958 days of data collection. The installation of a flash analog-to-digital converter readout system and a special calibration campaign using different source enclosures reduce uncertainties in the absolute energy calibration to less than 0.5% for visible energies larger than 2 MeV. The uncertainty in the cosmogenic Li9 and He8 background is reduced from 45% to 30% in the near detectors. A detailed investigation of the spent nuclear fuel history improves its uncertainty from 100% to 30%. Analysis of the relative νe rates and energy spectra among detectors yields sin22θ13=0.0856±0.0029 and Δm322=(2.471-0.070+0.068)×10-3 eV2 assuming the normal hierarchy, and Δm322=-(2.575-0.070+0.068)×10-3 eV2 assuming the inverted hierarchy.

Original languageEnglish (US)
Article number241805
JournalPhysical review letters
Volume121
Issue number24
DOIs
StatePublished - Dec 14 2018

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antineutrinos
hierarchies
reactors
spent fuels
oscillations
nuclear fuels
detectors
analog to digital converters
enclosure
installing
flash
readout
energy spectra
electrons
neutrinos
histories
energy
decay

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Measurement of the Electron Antineutrino Oscillation with 1958 Days of Operation at Daya Bay. / (The Daya Bay Collaboration).

In: Physical review letters, Vol. 121, No. 24, 241805, 14.12.2018.

Research output: Contribution to journalArticle

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abstract = "We report a measurement of electron antineutrino oscillation from the Daya Bay Reactor Neutrino Experiment with nearly 4 million reactor νe inverse β decay candidates observed over 1958 days of data collection. The installation of a flash analog-to-digital converter readout system and a special calibration campaign using different source enclosures reduce uncertainties in the absolute energy calibration to less than 0.5{\%} for visible energies larger than 2 MeV. The uncertainty in the cosmogenic Li9 and He8 background is reduced from 45{\%} to 30{\%} in the near detectors. A detailed investigation of the spent nuclear fuel history improves its uncertainty from 100{\%} to 30{\%}. Analysis of the relative νe rates and energy spectra among detectors yields sin22θ13=0.0856±0.0029 and Δm322=(2.471-0.070+0.068)×10-3 eV2 assuming the normal hierarchy, and Δm322=-(2.575-0.070+0.068)×10-3 eV2 assuming the inverted hierarchy.",
author = "{(The Daya Bay Collaboration)} and D. Adey and An, {F. P.} and Balantekin, {A. B.} and Band, {H. R.} and M. Bishai and S. Blyth and D. Cao and Cao, {G. F.} and J. Cao and Chan, {Y. L.} and Chang, {J. F.} and Y. Chang and Chen, {H. S.} and Chen, {S. M.} and Y. Chen and Chen, {Y. X.} and J. Cheng and Cheng, {Z. K.} and Cherwinka, {J. J.} and Chu, {M. C.} and A. Chukanov and Cummings, {J. P.} and Deng, {F. S.} and Ding, {Y. Y.} and Diwan, {M. V.} and M. Dolgareva and Dwyer, {D. A.} and Edwards, {W. R.} and M. Gonchar and Gong, {G. H.} and H. Gong and Gu, {W. Q.} and L. Guo and Guo, {X. H.} and Guo, {Y. H.} and Z. Guo and Hackenburg, {R. W.} and S. Hans and M. He and Heeger, {K. M.} and Heng, {Y. K.} and A. Higuera and Hsiung, {Y. B.} and Hu, {B. Z.} and Hu, {J. R.} and T. Hu and Hu, {Z. J.} and Huang, {H. X.} and Huang, {X. T.} and Huang, {Y. B.}",
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AU - Band, H. R.

AU - Bishai, M.

AU - Blyth, S.

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AU - Cao, G. F.

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AU - Chu, M. C.

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AU - Cummings, J. P.

AU - Deng, F. S.

AU - Ding, Y. Y.

AU - Diwan, M. V.

AU - Dolgareva, M.

AU - Dwyer, D. A.

AU - Edwards, W. R.

AU - Gonchar, M.

AU - Gong, G. H.

AU - Gong, H.

AU - Gu, W. Q.

AU - Guo, L.

AU - Guo, X. H.

AU - Guo, Y. H.

AU - Guo, Z.

AU - Hackenburg, R. W.

AU - Hans, S.

AU - He, M.

AU - Heeger, K. M.

AU - Heng, Y. K.

AU - Higuera, A.

AU - Hsiung, Y. B.

AU - Hu, B. Z.

AU - Hu, J. R.

AU - Hu, T.

AU - Hu, Z. J.

AU - Huang, H. X.

AU - Huang, X. T.

AU - Huang, Y. B.

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N2 - We report a measurement of electron antineutrino oscillation from the Daya Bay Reactor Neutrino Experiment with nearly 4 million reactor νe inverse β decay candidates observed over 1958 days of data collection. The installation of a flash analog-to-digital converter readout system and a special calibration campaign using different source enclosures reduce uncertainties in the absolute energy calibration to less than 0.5% for visible energies larger than 2 MeV. The uncertainty in the cosmogenic Li9 and He8 background is reduced from 45% to 30% in the near detectors. A detailed investigation of the spent nuclear fuel history improves its uncertainty from 100% to 30%. Analysis of the relative νe rates and energy spectra among detectors yields sin22θ13=0.0856±0.0029 and Δm322=(2.471-0.070+0.068)×10-3 eV2 assuming the normal hierarchy, and Δm322=-(2.575-0.070+0.068)×10-3 eV2 assuming the inverted hierarchy.

AB - We report a measurement of electron antineutrino oscillation from the Daya Bay Reactor Neutrino Experiment with nearly 4 million reactor νe inverse β decay candidates observed over 1958 days of data collection. The installation of a flash analog-to-digital converter readout system and a special calibration campaign using different source enclosures reduce uncertainties in the absolute energy calibration to less than 0.5% for visible energies larger than 2 MeV. The uncertainty in the cosmogenic Li9 and He8 background is reduced from 45% to 30% in the near detectors. A detailed investigation of the spent nuclear fuel history improves its uncertainty from 100% to 30%. Analysis of the relative νe rates and energy spectra among detectors yields sin22θ13=0.0856±0.0029 and Δm322=(2.471-0.070+0.068)×10-3 eV2 assuming the normal hierarchy, and Δm322=-(2.575-0.070+0.068)×10-3 eV2 assuming the inverted hierarchy.

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