Year: 2025
Type: article
Abstract: This Letter reports the precise measurement of the reactor antineutrino spectrum and flux based on the full dataset of $4.7\ifmmode\times\else\texttimes\fi{}{10}^{6}$ inverse-beta-decay candidates collected at Daya Bay near detectors. Expressed in terms of the inverse-beta-decay yield per fission, the antineutrino spectra from all reactor fissile isotopes and the specific $^{235}\mathrm{U}$ and $^{239}\mathrm{Pu}$ isotopes are measured with 1.3%, 3%, and 8% uncertainties, respectively, near the 3 MeV spectrum peak in reconstructed energy, reaching the best precision in the world. The total antineutrino flux and isotopic $^{235}\mathrm{U}$ and $^{239}\mathrm{Pu}$ fluxes are precisely measured to be $5.84\ifmmode\pm\else\textpm\fi{}0.07$, $6.16\ifmmode\pm\else\textpm\fi{}0.12$, and $4.16\ifmmode\pm\else\textpm\fi{}0.21$ in units of ${10}^{\ensuremath{-}43}\text{ }\text{ }{\mathrm{cm}}^{2}/\text{fission}$. These measurements are compared with the Huber-Mueller model, the reevaluated conversion model based on the Kurchatov Institute measurement, and the latest summation model (SM2023). The Daya Bay flux shows good consistency with the Kurchatov Institute and SM2023 models but disagrees with the Huber-Mueller model. The Daya Bay spectrum, however, disagrees with all model predictions.
Source: Physical Review Letters
Authors: F. P. An, W. D. Bai, A. B. Balantekin, M. Bishai, S. Blyth, G. F. Cao, J. Cao, J. F. Chang, Y. Chang, H. S. Chen, H. Y. Chen, S. M. Chen, Y. Chen, Y. X. Chen, Z. Y. Chen, J. Cheng, J. Cheng, Y.-C. Cheng, Z. K. Cheng, J. J. Cherwinka, M. C. Chu, J. P. Cummings, O. Dalager, F. S. Deng, X. Y. Ding, Y. Y. Ding, M. V. Diwan, T. Dohnal, D. Dolzhikov, J. Dove, K. V. Dugas, H. Y. Duyang, D. A. Dwyer, J. P. Gallo, M. Gonchar, G. H. Gong, H. Gong, W. Q. Gu, J. Y. Guo, L. Guo, X. H. Guo, Y. H. Guo, Z. Guo, R. W. Hackenburg, Y. Han, S. Hans, M. He, K. M. Heeger, Y. K. Heng, Y. K. Hor, Y. B. Hsiung, B. Z. Hu, J. R. Hu, T. Hu, Z. J. Hu, H. X. Huang, J. H. Huang, X. T. Huang, Y. B. Huang, P. Huber, D. E. Jaffe, K. L. Jen, X. L. Ji, X. P. Ji, R. A. Johnson, D. Jones, L. Kang, S. H. Kettell, S. Kohn, M. Kramer, T. J. Langford, J. Lee, J. H. C. Lee, R. T. Lei, R. Leitner, J. K. C. Leung, F. Li, H. L. Li, J. J. Li, Q. J. Li, R. H. Li, S. Li, S. Li, S. C. Li, W. D. Li, X. N. Li, X. Q. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, S. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, J. C. Liu, J. L. Liu, J. X. Liu, C. Lu, H. Q. Lu, K. B. Luk, B. Z. Ma, X. B. Ma, X. Y. Ma, Y. Q. Ma, R. C. Mandujano, C. Marshall, K. T. McDonald, R. D. McKeown, Y. Meng, J. Napolitano, D. Naumov, E. Naumova, T. M. T. Nguyen, J. P. Ochoa-Ricoux, A. Olshevskiy, J. Park, S. Patton, J. C. Peng, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, N. Raper, J. Ren, C. Morales Reveco, R. Rosero, B. Roskovec, X. C. Ruan, B. Russell, H. Steiner, J. L. Sun, T. Tmej, W.-H. Tse, C. E. Tull, Y. C. Tung, B. Viren, V. Vorobel, C. H. Wang, J. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. M. Wang, H. Y. Wei, L. H. Wei, W. Wei, L. J. Wen, K. Whisnant, C. G. White, H. L. H. Wong, E. Worcester, D. R. Wu, Q. Wu, W. J. Wu, D. M. Xia, Z. Q. Xie, Z. Z. Xing, H. K. Xu, J. L. Xu, T. Xu, T. Xue, C. G. Yang, L. Yang, Y. Z. Yang, H. F. Yao, M. Ye, M. Yeh, B. L. Young, H. Z. Yu, Z. Y. Yu, B. B. Yue, V. Zavadskyi, S. Zeng, Y. Zeng, L. Zhan, 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. Zhang, J. Zhao, R. Z. Zhao, L. Zhou, H. L. Zhuang, J. H. Zou
Institutions: Sun Yat-sen University, University of Wisconsin System, Brookhaven National Laboratory, National Taiwan University, Institute of High Energy Physics, National United University, Tsinghua University, North China Electric Power University, Shenzhen University, Chinese University of Hong Kong, Siena College, University of California System, University of Science and Technology of China, Shandong University, Charles University, Joint Institute for Nuclear Research, University of Illinois Urbana-Champaign, Lawrence Berkeley National Laboratory, Illinois Institute of Technology, Beijing Normal University, Xi'an Jiaotong University, Yale University, China Institute of Atomic Energy, Guangxi University, Virginia Tech, National Yang Ming Chiao Tung University, University of Cincinnati, Temple University, Dongguan University of Technology, University of Hong Kong, Hunan University, Nanjing University, Nankai University, Shanghai Jiao Tong University, Princeton University, Hong Kong University of Science and Technology, California Institute of Technology, William & Mary, China General Nuclear Power Corporation (China), National University of Defense Technology, Iowa State University, Chongqing University
Language: English
Topic: Neutrino Physics Research
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: U.S. Department of Energy, Univerzita Karlova v Praze, Ministry of Education, National Natural Science Foundation of China, Ministerstvo Školství, Mládeže a Tělovýchovy, Chinese Academy of Sciences, Ministry of Science and Technology of the People's Republic of China, Research Grants Council, University Grants Committee, Joint Institute for Nuclear Research, CAS Center for Excellence in Particle Physics
OpenAlex ID: W4410550353