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Title: Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment

Journal Article · · Physical Review. D.
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A measurement of electron antineutrino oscillation by the Daya Bay Reactor Neutrino Experiment is described in detail. Six 2.9-GWth nuclear power reactors of the Daya Bay and Ling Ao nuclear power facilities served as intense sources of νe's. Comparison of the νe rate and energy spectrum measured by antineutrino detectors far from the nuclear reactors (~1500-1950 m) relative to detectors near the reactors (~350-600 m) allowed a precise measurement of νe disappearance. More than 2.5 million νe inverse beta-decay interactions were observed, based on the combination of 217 days of operation of six antineutrino detectors (December, 2011-July, 2012) with a subsequent 1013 days using the complete configuration of eight detectors (October, 2012-July, 2015). The νe rate observed at the far detectors relative to the near detectors showed a significant deficit, R=0.949±0.002(stat)±0.002(syst). The energy dependence of νe disappearance showed the distinct variation predicted by neutrino oscillation. Analysis using an approximation for the three-flavor oscillation probability yielded the flavor-mixing angle sin22θ13=0.0841±0.0027(stat)±0.0019(syst) and the effective neutrino mass-squared difference of |Δmee2|=(2.50±0.06(stat)±0.06(syst))×10-3 eV2. Analysis using the exact three-flavor probability found Δm322=(2.45±0.06(stat)±0.06(syst))×10-3 eV2 assuming the normal neutrino mass hierarchy and Δm322=(-2.56±0.06(stat)±0.06(syst))×10-3 eV2 for the inverted hierarchy.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
Daya Bay Collaboration
Grant/Contract Number:
SC00112704; AC02-05CH11231
OSTI ID:
1354630
Alternate ID(s):
OSTI ID: 1350158; OSTI ID: 1435083
Report Number(s):
BNL-113773-2017-JA; PRVDAQ; R&D Project: PO-022; KA2201020
Journal Information:
Physical Review. D., Vol. 95, Issue 7; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 132 works
Citation information provided by
Web of Science

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Realistic tribimaximal neutrino mixing journal September 2018
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Comprehensive measurement of pp-chain solar neutrinos journal October 2018
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Efficient neutrino oscillation parameter inference using Gaussian processes text January 2020
CP Symmetries as Guiding Posts: Revamping Tri-Bi-Maximal Mixing-I text January 2018
Invisible neutrino decays at the MOMENT experiment text January 2018
Neutrino Oscillations and Non-standard Interactions journal February 2018
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Neutrino oscillations and Non-Standard Interactions preprint January 2017
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Measurement of Atmospheric Neutrino Oscillations at 6–56 GeV with IceCube DeepCore text January 2018
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