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Improved measurement of electron antineutrino disappearance at Daya Bay

An, F. P. and Carr, R. and Dwyer, D. and McKeown, R. D. and Qian, X. and Tsang, R. H. M. and Wu, F. F. (2013) Improved measurement of electron antineutrino disappearance at Daya Bay. Chinese Physics C, 37 (1). Art. No. 011001. ISSN 1674-1137. https://resolver.caltech.edu/CaltechAUTHORS:20130403-134850107

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Abstract

We report an improved measurement of the neutrino mixing angle θ_(13) from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for sin^22θ_(13) with a significance of 7.7 standard deviations. Electron antineutrinos from six reactors of 2.9 GW_(th) were detected in six antineutrino detectors deployed in two near (flux-weighted baselines of 470 m and 576 m) and one far (1648 m) underground experimental halls. Using 139 days of data, 28909 (205308) electron antineutrino candidates were detected at the far hall (near halls). The ratio of the observed to the expected number of antineutrinos assuming no oscillations at the far hall is 0.944±0.007(stat.)±0.003(syst.). An analysis of the relative rates in six detectors finds sin^22θ_(13)=0.089±0.010(stat.)±0.005(syst.) in a three-neutrino framework.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/1674-1137/37/1/011001DOIUNSPECIFIED
http://iopscience.iop.org/1674-1137/37/1/011001/PublisherUNSPECIFIED
http://arxiv.org/abs/1210.6327arXivUNSPECIFIED
Additional Information:© 2013 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd. Received 23 October 2012, Revised 15 November 2012. Supported by the Ministry of Science and Technology of China, the United States Department of Energy, the Chinese Academy of Sciences, the National Natural Science Foundation of China, the Guangdong provincial government, the Shenzhen municipal government, the China Guangdong Nuclear Power Group, Shanghai Laboratory for Particle Physics and Cosmology, the Research Grants Council of the Hong Kong Special Administrative Region of China, University Development Fund of The University of Hong Kong, the MOE program for Research of Excellence at NTU, NCTU, and NSC fund support from Taipei, the U.S. National Science Foundation, the Alfred P. Sloan Foundation, the Ministry of Education, Youth and Sports of the Czech Republic, the Czech Science Foundation, and the Joint Institute of Nuclear Research in Dubna, Russia. We thank Yellow River Engineering Consulting Co., Ltd. and China railway 15th Bureau Group Co., Ltd. for building the underground laboratory. We are grateful for the ongoing cooperation from the China Guangdong Nuclear Power Group and China Light & Power Company.
Funders:
Funding AgencyGrant Number
Ministry of Science and Technology of ChinaUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Chinese Academy of SciencesUNSPECIFIED
National Natural Science Foundation of ChinaUNSPECIFIED
Guangdong provincial governmentUNSPECIFIED
Shenzhen municipal governmentUNSPECIFIED
China Guangdong Nuclear Power GroupUNSPECIFIED
Shanghai Laboratory for Particle Physics and CosmologyUNSPECIFIED
Research Grants Council of the Hong Kong Special Administrative Region of ChinaUNSPECIFIED
University Development Fund of The University of Hong KongUNSPECIFIED
MOE program for Research of ExcellenceUNSPECIFIED
NSFUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Ministry of Education, Youth and Sports of the Czech RepublicUNSPECIFIED
Czech Science FoundationUNSPECIFIED
Joint Institute of Nuclear Research in Dubna, RussiaUNSPECIFIED
Subject Keywords:neutrino oscillation; neutrino mixing; reactor; Daya Bay
Issue or Number:1
Classification Code:PACS: 29.40.Mc, 14.60.Pq
Record Number:CaltechAUTHORS:20130403-134850107
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130403-134850107
Official Citation:Improved measurement of electron antineutrino disappearance at Daya Bay F. P. An (安丰鹏) et al 2013 Chinese Phys. C 37 011001
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37745
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:03 Apr 2013 21:18
Last Modified:03 Oct 2019 04:50

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