Improved Measurement of the Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay

F P An¹, W D Bai¹, A B Balantekin², M Bishai³, S Blyth⁴, G F Cao⁵, J Cao⁵, J F Chang⁵, Y Chang⁶, H S Chen⁵, H Y Chen⁷, S M Chen⁷, Y Chen^{1

8}, Y X Chen⁹, J Cheng⁹, J Cheng⁹, Y-C Cheng⁴, Z K Cheng¹, J J Cherwinka², M C Chu¹⁰, J P Cummings¹¹, O Dalager¹², F S Deng¹³, Y Y Ding⁵, M V Diwan³, T Dohnal¹⁴, D Dolzhikov¹⁵, J Dove¹⁶, K V Dugas¹², H Y Duyang¹⁷, D A Dwyer¹⁸, J P Gallo¹⁹, M Gonchar¹⁵, G H Gong⁷, H Gong⁷, W Q Gu³, J Y Guo¹, L Guo⁷, X H Guo²⁰, Y H Guo²¹, Z Guo⁷, R W Hackenburg³, Y Han¹, S Hans³, M He⁵, K M Heeger²², Y K Heng⁵, Y K Hor¹, Y B Hsiung⁴, B Z Hu⁴, J R Hu⁵, T Hu⁵, Z J Hu¹, H X Huang²³, J H Huang⁵, X T Huang¹⁷, Y B Huang²⁴, P Huber²⁵, D E Jaffe³, K L Jen²⁶, X L Ji⁵, X P Ji³, R A Johnson²⁷, D Jones²⁸, L Kang²⁹, S H Kettell³, S Kohn³⁰, M Kramer^{18

30}, T J Langford²², J Lee¹⁸, J H C Lee³¹, R T Lei²⁹, R Leitner¹⁴, J K C Leung³¹, F Li⁵, H L Li⁵, J J Li⁷, Q J Li⁵, R H Li⁵, S Li²⁹, S C Li²⁵, W D Li⁵, X N Li⁵, X Q Li³², Y F Li⁵, Z B Li¹, H Liang¹³, C J Lin¹⁸, G L Lin²⁶, S Lin²⁹, J J Ling¹, J M Link²⁵, L Littenberg³, B R Littlejohn¹⁹, J C Liu⁵, J L Liu³³, J X Liu⁵, C Lu³⁴, H Q Lu⁵, K B Luk^{18

30

35}, B Z Ma¹⁷, X B Ma⁹, X Y Ma⁵, Y Q Ma⁵, R C Mandujano¹², C Marshall¹⁸, K T McDonald³⁴, R D McKeown^{36

37}, Y Meng³³, J Napolitano²⁸, D Naumov¹⁵, E Naumova¹⁵, T M T Nguyen²⁶, J P Ochoa-Ricoux¹², A Olshevskiy¹⁵, J Park²⁵, S Patton¹⁸, J C Peng¹⁶, C S J Pun³¹, F Z Qi⁵, M Qi³⁸, X Qian³, N Raper¹, J Ren²³, C Morales Reveco¹², R Rosero³, B Roskovec¹⁴, X C Ruan²³, B Russell¹⁸, H Steiner^{18

30}, J L Sun³⁹, T Tmej¹⁴, K Treskov¹⁵, W-H Tse¹⁰, C E Tull¹⁸, Y C Tung⁴, B Viren³, V Vorobel¹⁴, C H Wang⁶, J Wang¹, M Wang¹⁷, N Y Wang²⁰, R G Wang⁵, W Wang^{1

37}, X Wang⁴⁰, Y Wang³⁸, Y F Wang⁵, Z Wang⁵, Z Wang⁷, Z M Wang⁵, H Y Wei³, L H Wei⁵, L J Wen⁵, K Whisnant⁴¹, C G White¹⁹, H L H Wong^{18

30}, E Worcester³, D R Wu⁵, Q Wu¹⁷, W J Wu⁵, D M Xia⁴², Z Q Xie⁵, Z Z Xing⁵, H K Xu⁵, J L Xu⁵, T Xu⁷, T Xue⁷, C G Yang⁵, L Yang²⁹, Y Z Yang⁷, H F Yao⁵, M Ye⁵, M Yeh³, B L Young⁴¹, H Z Yu¹, Z Y Yu⁵, B B Yue¹, V Zavadskyi^{3

15}, S Zeng⁵, Y Zeng¹, L Zhan⁵, C Zhang³, F Y Zhang³³, H H Zhang¹, J L Zhang³⁸, J W Zhang⁵, Q M Zhang²¹, S Q Zhang¹, X T Zhang⁵, Y M Zhang¹, Y X Zhang³⁹, Y Y Zhang³³, Z J Zhang²⁹, Z P Zhang¹³, Z Y Zhang⁵, J Zhao⁵, R Z Zhao⁵, L Zhou⁵, H L Zhuang⁵, J H Zou⁵; Daya Bay Collaboration

Affiliations

¹ Sun Yat-Sen (Zhongshan) University, Guangzhou.
² University of Wisconsin, Madison, Wisconsin 53706.
³ Brookhaven National Laboratory, Upton, New York 11973.
⁴ Department of Physics, National Taiwan University, Taipei.
⁵ Institute of High Energy Physics, Beijing.
⁶ National United University, Miao-Li.
⁷ Department of Engineering Physics, Tsinghua University, Beijing.
⁸ Shenzhen University, Shenzhen.
⁹ North China Electric Power University, Beijing.
¹⁰ Chinese University of Hong Kong, Hong Kong.
¹¹ Siena College, Loudonville, New York 12211.
¹² Department of Physics and Astronomy, University of California, Irvine, California 92697.
¹³ University of Science and Technology of China, Hefei.
¹⁴ Charles University, Faculty of Mathematics and Physics, Prague.
¹⁵ Joint Institute for Nuclear Research, Dubna, Moscow Region.
¹⁶ Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801.
¹⁷ Shandong University, Jinan.
¹⁸ Lawrence Berkeley National Laboratory, Berkeley, California 94720.
¹⁹ Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616.
²⁰ Beijing Normal University, Beijing.
²¹ Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an.
²² Wright Laboratory and Department of Physics, Yale University, New Haven, Connecticut 06520.
²³ China Institute of Atomic Energy, Beijing.
²⁴ Guangxi University, No. 100 Daxue East Road, Nanning.
²⁵ Center for Neutrino Physics, Virginia Tech, Blacksburg, Virginia 24061.
²⁶ Institute of Physics, National Chiao-Tung University, Hsinchu.
²⁷ Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221.
²⁸ Department of Physics, College of Science and Technology, Temple University, Philadelphia, Pennsylvania 19122.
²⁹ Dongguan University of Technology, Dongguan.
³⁰ Department of Physics, University of California, Berkeley, California 94720.
³¹ Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
³² School of Physics, Nankai University, Tianjin.
³³ Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai.
³⁴ Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544.
³⁵ The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong.
³⁶ California Institute of Technology, Pasadena, California 91125.
³⁷ College of William and Mary, Williamsburg, Virginia 23187.
³⁸ Nanjing University, Nanjing.
³⁹ China General Nuclear Power Group, Shenzhen.
⁴⁰ College of Electronic Science and Engineering, National University of Defense Technology, Changsha.
⁴¹ Iowa State University, Ames, Iowa 50011.
⁴² Chongqing University, Chongqing.

PMID: 37295075
DOI: 10.1103/PhysRevLett.130.211801

Improved Measurement of the Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay

F P An et al. Phys Rev Lett. 2023.

. 2023 May 26;130(21):211801.

doi: 10.1103/PhysRevLett.130.211801.

Authors

Affiliations

¹ Sun Yat-Sen (Zhongshan) University, Guangzhou.
² University of Wisconsin, Madison, Wisconsin 53706.
³ Brookhaven National Laboratory, Upton, New York 11973.
⁴ Department of Physics, National Taiwan University, Taipei.
⁵ Institute of High Energy Physics, Beijing.
⁶ National United University, Miao-Li.
⁷ Department of Engineering Physics, Tsinghua University, Beijing.
⁸ Shenzhen University, Shenzhen.
⁹ North China Electric Power University, Beijing.
¹⁰ Chinese University of Hong Kong, Hong Kong.
¹¹ Siena College, Loudonville, New York 12211.
¹² Department of Physics and Astronomy, University of California, Irvine, California 92697.
¹³ University of Science and Technology of China, Hefei.
¹⁴ Charles University, Faculty of Mathematics and Physics, Prague.
¹⁵ Joint Institute for Nuclear Research, Dubna, Moscow Region.
¹⁶ Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801.
¹⁷ Shandong University, Jinan.
¹⁸ Lawrence Berkeley National Laboratory, Berkeley, California 94720.
¹⁹ Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616.
²⁰ Beijing Normal University, Beijing.
²¹ Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an.
²² Wright Laboratory and Department of Physics, Yale University, New Haven, Connecticut 06520.
²³ China Institute of Atomic Energy, Beijing.
²⁴ Guangxi University, No. 100 Daxue East Road, Nanning.
²⁵ Center for Neutrino Physics, Virginia Tech, Blacksburg, Virginia 24061.
²⁶ Institute of Physics, National Chiao-Tung University, Hsinchu.
²⁷ Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221.
²⁸ Department of Physics, College of Science and Technology, Temple University, Philadelphia, Pennsylvania 19122.
²⁹ Dongguan University of Technology, Dongguan.
³⁰ Department of Physics, University of California, Berkeley, California 94720.
³¹ Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
³² School of Physics, Nankai University, Tianjin.
³³ Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai.
³⁴ Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544.
³⁵ The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong.
³⁶ California Institute of Technology, Pasadena, California 91125.
³⁷ College of William and Mary, Williamsburg, Virginia 23187.
³⁸ Nanjing University, Nanjing.
³⁹ China General Nuclear Power Group, Shenzhen.
⁴⁰ College of Electronic Science and Engineering, National University of Defense Technology, Changsha.
⁴¹ Iowa State University, Ames, Iowa 50011.
⁴² Chongqing University, Chongqing.

PMID: 37295075
DOI: 10.1103/PhysRevLett.130.211801

Abstract

Reactor neutrino experiments play a crucial role in advancing our knowledge of neutrinos. In this Letter, the evolution of the flux and spectrum as a function of the reactor isotopic content is reported in terms of the inverse-beta-decay yield at Daya Bay with 1958 days of data and improved systematic uncertainties. These measurements are compared with two signature model predictions: the Huber-Mueller model based on the conversion method and the SM2018 model based on the summation method. The measured average flux and spectrum, as well as the flux evolution with the ^{239}Pu isotopic fraction, are inconsistent with the predictions of the Huber-Mueller model. In contrast, the SM2018 model is shown to agree with the average flux and its evolution but fails to describe the energy spectrum. Altering the predicted inverse-beta-decay spectrum from ^{239}Pu fission does not improve the agreement with the measurement for either model. The models can be brought into better agreement with the measurements if either the predicted spectrum due to ^{235}U fission is changed or the predicted ^{235}U, ^{238}U, ^{239}Pu, and ^{241}Pu spectra are changed in equal measure.

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Improved Measurement of the Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay

Affiliations

Improved Measurement of the Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay

Authors

Affiliations

Abstract

MeSH terms

Substances

LinkOut - more resources

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