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Spectral Measurement of Electron Antineutrino Oscillation Amplitude and Frequency at Daya Bay

An, F. P. and Carr, R. and Qian, X. and Tsang, R. H. M. (2014) Spectral Measurement of Electron Antineutrino Oscillation Amplitude and Frequency at Daya Bay. Physical Review Letters, 112 (6). Art. No. 061801. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:20140327-145449958

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Abstract

A measurement of the energy dependence of antineutrino disappearance at the Daya Bay reactor neutrino experiment is reported. Electron antineutrinos (ν¯_e) from six 2.9  GW_(th) reactors were detected with six detectors deployed in two near (effective baselines 512 and 561 m) and one far (1579 m) underground experimental halls. Using 217 days of data, 41 589 (203 809 and 92 912) antineutrino candidates were detected in the far hall (near halls). An improved measurement of the oscillation amplitude sin^2 2θ_(13) = 0.090^(+0.008)_(−0.009) and the first direct measurement of the ν¯e mass-squared difference |Δm2ee|=(2.59^(+0.19)_(−0.20))×10^−3  eV^2 is obtained using the observed ν¯_e rates and energy spectra in a three-neutrino framework. This value of |Δm^(2)_(ee)| is consistent with |Δm^(2)_(μμ)| measured by muon neutrino disappearance, supporting the three-flavor oscillation model.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.112.061801DOIArticle
http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=1&SID=3EhUhhIPqU3TKwJuS3i&page=1&doc=1PublisherArticle
http://arxiv.org/abs/1310.6732arXivDiscussion Paper
Additional Information:© 2014 American Physical Society. Received 24 October 2013; published 10 February 2014. The Daya Bay Experiment is supported in part 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 National Taiwan University, National Chiao-Tung University, and NSC fund support from Taiwan, the U.S. National Science Foundation, the Alfred P. Sloan Foundation, the Ministry of Education, Youth and Sports of the Czech Republic, Charles University in Prague, Yale University, the Joint Institute of Nuclear Research in Dubna, Russia, and the NSFC-RFBR joint research program. We acknowledge 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 Excellence at National Taiwan UniversityUNSPECIFIED
National Chiao-Tung UniversityUNSPECIFIED
NSC fund support from TaiwanUNSPECIFIED
NSFUNSPECIFIED
Ministry of Education, Youth and Sports of the Czech RepublicUNSPECIFIED
Charles University in PragueUNSPECIFIED
Yale UniversityUNSPECIFIED
Joint Institute of Nuclear Research in Dubna, RussiaUNSPECIFIED
NSFC-RFBR joint research programUNSPECIFIED
Classification Code:PACS numbers: 14.60.Pq, 13.15.+g, 28.50.Hw, 29.40.Mc
Record Number:CaltechAUTHORS:20140327-145449958
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140327-145449958
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44542
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:28 Mar 2014 15:50
Last Modified:28 Mar 2014 15:50

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