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Title: Measurement of the reactor antineutrino flux and spectrum at Daya Bay

Journal Article · · Physical Review Letters

This Letter reports a measurement of the flux and energy spectrum of electron antineutrinos from six 2.9~GWth nuclear reactors with six detectors deployed in two near (effective baselines 512~m and 561~m) and one far (1,579 m) underground experimental halls in the Daya Bay experiment. Using 217 days of data, 296,721 and 41,589 inverse beta decay (IBD) candidates were detected in the near and far halls, respectively. The measured IBD yield is (1.55 ± 0.04) × 10–18 cm2/GW/day or (5.92 ± 0.14) × 10–43 cm2/fission. This flux measurement is consistent with previous short-baseline reactor antineutrino experiments and is 0.946 ± 0.022 (0.991 ± 0.023) relative to the flux predicted with the Huber+Mueller (ILL+Vogel) fissile antineutrino model. The measured IBD positron energy spectrum deviates from both spectral predictions by more than 2σ over the full energy range with a local significance of up to ~4σ between 4-6 MeV. Furthermore, a reactor antineutrino spectrum of IBD reactions is extracted from the measured positron energy spectrum for model-independent predictions.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
Daya Bay Collaboration
Grant/Contract Number:
SC00112704; AC02-05CH11231; SC0009973
OSTI ID:
1235879
Alternate ID(s):
OSTI ID: 1237875; OSTI ID: 1379090; OSTI ID: 1594403
Report Number(s):
BNL-111707-2016-JA; PRLTAO; R&D Project: PO-022; KA2201020; TRN: US1600803
Journal Information:
Physical Review Letters, Vol. 116, Issue 6; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 170 works
Citation information provided by
Web of Science

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The PROSPECT physics program journal October 2016
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Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay journal January 2017
Determining Reactor Fuel Type from Continuous Antineutrino Monitoring journal September 2017
Extracting Majorana properties from strong bounds on neutrinoless double beta decay journal February 2017
First observation of low energy electron neutrinos in a liquid argon time projection chamber journal April 2017
Prospects for improved understanding of isotopic reactor antineutrino fluxes journal January 2018
Probing a four flavor vis-a-vis three flavor neutrino mixing for ultrahigh energy neutrino signals at a 1 km 2 detector journal May 2018
Limits on Active to Sterile Neutrino Oscillations from Disappearance Searches in the MINOS, Daya Bay, and Bugey-3 Experiments journal October 2016
Large Impact of the Decay of Niobium Isomers on the Reactor ν ¯ e Summation Calculations journal January 2019
Extraction of neutrino mixing parameters from experiments with multiple identical detectors journal August 2018
Roles of sterile neutrinos in particle physics and cosmology journal April 2019
A dark matter signature for condensed neutrinos journal August 2016
Neutrino Oscillation Analysis of 217 Live Days of Daya Bay and 500 Live Days of RENO journal January 2020
Neutrino Oscillations and Non-standard Interactions journal February 2018
First Search for Short-Baseline Neutrino Oscillations at HFIR with PROSPECT text January 2018
First Observation of Low Energy Electron Neutrinos in a Liquid Argon Time Projection Chamber text January 2017
Improved Search for a Light Sterile Neutrino with the Full Configuration of the Daya Bay Experiment text January 2016
Limits on Active to Sterile Neutrino Oscillations from Disappearance Searches in the MINOS, Daya Bay, and Bugey-3 Experiments text January 2016
Comprehensive geoneutrino analysis with Borexino text January 2020
A Dark Matter Signature for Condensed Neutrinos text January 2016
Limits on Active to Sterile Neutrino Oscillations from Disappearance Searches in the MINOS, Daya Bay, and Bugey-3 Experiments text January 2016
First Observation of Low Energy Electron Neutrinos in a Liquid Argon Time Projection Chamber text January 2016
Sterile neutrino search at NEOS Experiment text January 2016
Coherent Neutrino-Nucleus Scattering and new Neutrino Interactions text January 2016
Determining reactor fuel type from continuous antineutrino monitoring text January 2016
Joint short- and long-baseline constraints on light sterile neutrinos text January 2016
A novel segmented-scintillator antineutrino detector text January 2017
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Neutrino oscillation analysis of 217 live-days of Daya Bay and 500 live-days of RENO text January 2019

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