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Published April 21, 2023 | Published + Supplemental Material
Journal Article Open

Precision Measurement of Reactor Antineutrino Oscillation at Kilometer-Scale Baselines by Daya Bay

An, F. P.
Bai, W. D.
Balantekin, A. B.
Bishai, M.
Blyth, S.
Cao, G. F.
Cao, J.
Chang, J. F.
Chang, Y.
Chen, H. S.
Chen, H. Y.
Chen, S. M.
Chen, Y.
Chen, Y. X.
Chen, Z. Y.
Cheng, J.
Cheng, Z. K.
Cherwinka, J. J.
Chu, M. C.
Cummings, J. P.
Dalager, O.
Deng, F. S.
Ding, Y. Y.
Ding, X. Y.
Diwan, M. V.
Dohnal, T.
Dolzhikov, D.
Dove, J.
Duyang, H. Y.
Dwyer, D. A.
Gallo, J. P.
Gonchar, M.
Gong, G. H.
Gong, H.
Gu, W. Q.
Guo, J. Y.
Guo, L.
Guo, X. H.
Guo, Y. H.
Guo, Z.
Hackenburg, R. W.
Han, Y.
Hans, S.
He, M.
Heeger, K. M.
Heng, Y. K.
Hor, Y. K.
Hsiung, Y. B.
Hu, B. Z.
Hu, J. R.
Hu, T.
Hu, Z. J.
Huang, H. X.
Huang, J. H.
Huang, X. T.
Huang, Y. B.
Huber, P.
Jaffe, D. E.
Jen, K. L.
Ji, X. L.
Ji, X. P.
Johnson, R. A.
Jones, D.
Kang, L.
Kettell, S. H.
Kohn, S.
Kramer, M.
Langford, T. J.
Lee, J.
Lee, J. H. C.
Lei, R. T.
Leitner, R.
Leung, J. K. C.
Li, F.
Li, H. L.
Li, J. J.
Li, Q. J.
Li, R. H.
Li, S.
Li, S. C.
Li, W. D.
Li, X. N.
Li, X. Q.
Li, Y. F.
Li, Z. B.
Liang, H.
Lin, C. J.
Lin, G. L.
Lin, S.
Ling, J. J.
Link, J. M.
Littenberg, L.
Littlejohn, B. R.
Liu, J. C.
Liu, J. L.
Liu, J. X.
Lu, C.
Lu, H. Q.
Luk, K. B. ORCID icon
Ma, B. Z.
Ma, X. B.
Ma, X. Y.
Ma, Y. Q.
Mandujano, R. C.
Marshall, C.
McDonald, K. T.
McKeown, R. D.
Meng, Y.
Napolitano, J.
Naumov, D.
Naumova, E.
Nguyen, T. M. T.
Ochoa-Ricoux, J. P.
Olshevskiy, A.
Pan, H.-R.
Park, J.
Patton, S.
Peng, J. C.
Pun, C. S. J.
Qi, F. Z.
Qi, M.
Qian, X.
Raper, N.
Ren, J.
Morales Reveco, C.
Rosero, R.
Roskovec, B.
Ruan, X. C.
Russell, B.
Steiner, H.
Sun, J. L.
Tmej, T.
Treskov, K.
Tse, W.-H.
Tull, C. E.
Viren, B.
Vorobel, V.
Wang, C. H.
Wang, J.
Wang, M.
Wang, N. Y.
Wang, R. G.
Wang, W.
Wang, X.
Wang, Y.
Wang, Y. F.
Wang, Z.
Wang, Z.
Wang, Z. M.
Wei, H. Y.
Wei, L. H.
Wei, W.
Wen, L. J.
Whisnant, K.
White, C. G.
Wong, H. L. H.
Worcester, E.
Wu, D. R.
Wu, Q.
Wu, W. J.
Xia, D. M.
Xie, Z. Q.
Xing, Z. Z.
Xu, H. K.
Xu, J. L.
Xu, T.
Xue, T.
Yang, C. G.
Yang, L.
Yang, Y. Z.
Yao, H. F.
Ye, M.
Yeh, M.
Young, B. L.
Yu, H. Z.
Yu, Z. Y.
Yue, B. B.
Zavadskyi, V.
Zeng, S.
Zeng, Y.
Zhan, L.
Zhang, C.
Zhang, F. Y.
Zhang, H. H.
Zhang, J. L.
Zhang, J. W.
Zhang, Q. M.
Zhang, S. Q.
Zhang, X. T.
Zhang, Y. M.
Zhang, Y. X.
Zhang, Y. Y.
Zhang, Z. J.
Zhang, Z. P.
Zhang, Z. Y.
Zhao, J.
Zhao, R. Z.
Zhou, L.
Zhuang, H. L.
Zou, J. H.
Daya Bay Collaboration


We present a new determination of the smallest neutrino mixing angle θ₁₃ and the mass-squared difference Δm²₃₂ using a final sample of 5.55 × 10⁶ inverse beta-decay (IBD) candidates with the final-state neutron captured on gadolinium. This sample is selected from the complete dataset obtained by the Daya Bay reactor neutrino experiment in 3158 days of operation. Compared to the previous Daya Bay results, selection of IBD candidates has been optimized, energy calibration refined, and treatment of backgrounds further improved. The resulting oscillation parameters are sin²2θ₁₃ = 0.0851±0.0024, Δm²₃₂ = (2.466±0.060)×10⁻³ eV² for the normal mass ordering or Δm²₃₂ = −(2.571±0.060)×10⁻³ eV² for the inverted mass ordering.

Additional Information

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3. The Daya Bay experiment is supported in part by the Ministry of Science and Technology of China, the U.S. Department of Energy, the Chinese Academy of Sciences, the CAS Center for Excellence in Particle Physics, the National Natural Science Foundation of China, the Guangdong provincial government, the Shenzhen municipal government, the China General Nuclear Power Group, the Research Grants Council of the Hong Kong Special Administrative Region of China, the Ministry of Education in Taiwan, the U.S. National Science Foundation, the Ministry of Education, Youth, and Sports of the Czech Republic, the Charles University Research Centre UNCE, and the Joint Institute of Nuclear Research in Dubna, Russia. 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 cooperation from the China Guangdong Nuclear Power Group and China Light & Power Company.

Attached Files

Published - PhysRevLett.130.161802.pdf

Supplemental Material - DayaBay_BackgroundSpectrum_EH1_3158days.txt

Supplemental Material - DayaBay_BackgroundSpectrum_EH2_3158days.txt

Supplemental Material - DayaBay_BackgroundSpectrum_EH3_3158days.txt

Supplemental Material - DayaBay_DeltaChiSq_IO_3158days.txt

Supplemental Material - DayaBay_DeltaChiSq_NO_3158days.txt

Supplemental Material - DayaBay_DetectorModel_Etrue_to_Eprompt.txt

Supplemental Material - DayaBay_IBDPromptSpectrum_EH1_3158days.txt

Supplemental Material - DayaBay_IBDPromptSpectrum_EH2_3158days.txt

Supplemental Material - DayaBay_IBDPromptSpectrum_EH3_3158days.txt

Supplemental Material - supplementary.pdf


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Additional details

August 22, 2023
October 20, 2023