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Improved Measurement of the Reactor Antineutrino Flux at Daya Bay

Authors :
Daya Bay Collaboration
Adey, D.
An, F. P.
Balantekin, A. B.
Band, H. R.
Bishai, M.
Blyth, S.
Cao, D.
Cao, G. F.
Cao, J.
Chan, Y. L.
Chang, J. F.
Chang, Y.
Chen, H. S.
Chen, S. M.
Chen, Y.
Chen, Y. X.
Cheng, J.
Cheng, Z. K.
Cherwinka, J. J.
Chu, M. C.
Chukanov, A.
Cummings, J. P.
Deng, F. S.
Ding, Y. Y.
Diwan, M. V.
Dolgareva, M.
Dove, J.
Dwyer, D. A.
Edwards, W. R.
Gonchar, M.
Gong, G. H.
Gong, H.
Gu, W. Q.
Guo, L.
Guo, X. H.
Guo, Y. H.
Guo, Z.
Hackenburg, R. W.
Hans, S.
He, M.
Heeger, K. M.
Heng, Y. K.
Higuera, A.
Hsiung, Y. B.
Hu, B. Z.
Hu, T.
Hu, Z. J.
Huang, H. X.
Huang, X. T.
Huang, Y. B.
Huber, P.
Huo, W.
Hussain, G.
Jaffe, D. E.
Jen, K. L.
Ji, X. L.
Ji, X. P.
Johnson, R. A.
Jones, D.
Kang, L.
Kettell, S. H.
Koerner, L. W.
Kohn, S.
Kramer, M.
Langford, T. J.
Lebanowski, L.
Lee, J.
Lee, J. H. C.
Lei, R. T.
Leitner, R.
Leung, J. K. C.
Li, C.
Li, F.
Li, H. L.
Li, Q. J.
Li, S.
Li, S. C.
Li, S. J.
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.
Lin, S. K.
Lin, Y. -C.
Ling, J. J.
Link, J. M.
Littenberg, L.
Littlejohn, B. R.
Liu, J. C.
Liu, J. L.
Liu, Y.
Liu, Y. H.
Loh, C. W.
Lu, C.
Lu, H. Q.
Lu, J. S.
Luk, K. B.
Ma, X. B.
Ma, X. Y.
Ma, Y. Q.
Malyshkin, Y.
Marshall, C.
Caicedo, D. A. Martinez
McDonald, K. T.
McKeown, R. D.
Mitchell, I.
Lepin, L. Mora
Napolitano, J.
Naumov, D.
Naumova, E.
Ochoa-Ricoux, J. P.
Olshevskiy, A.
Pan, H. -R.
Park, J.
Patton, S.
Pec, V.
Peng, J. C.
Pinsky, L.
Pun, C. S. J.
Qi, F. Z.
Qi, M.
Qian, X.
Qiu, R. M.
Raper, N.
Ren, J.
Rosero, R.
Roskovec, B.
Ruan, X. C.
Steiner, H.
Sun, J. L.
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. F.
Wang, Z.
Wang, Z. M.
Wei, H. Y.
Wei, L. H.
Wen, L. J.
Whisnant, K.
White, C. G.
Wise, T.
Wong, H. L. H.
Wong, S. C. F.
orcester, E.
Wu, Q.
Wu, W. J.
Xia, D. M.
Xing, Z. Z.
Xu, J. L.
Xue, T.
Yang, C. G.
Yang, H.
Yang, L.
Yang, M. S.
Yang, M. T.
Yang, Y. Z.
Ye, M.
Yeh, M.
Young, B. L.
Yu, H. Z.
Yu, Z. Y.
Yue, B. B.
Zeng, S.
Zhan, L.
Zhang, C.
Zhang, C. C.
Zhang, F. Y.
Zhang, H. H.
Zhang, J. W.
Zhang, Q. M.
Zhang, R.
Zhang, X. F.
Zhang, X. T.
Zhang, Y. M.
Zhang, Y. X.
Zhang, Y. Y.
Zhang, Z. J.
Zhang, Z. P.
Zhang, Z. Y.
Zhao, J.
Zheng, P.
Zhou, L.
Zhuang, H. L.
Zou, J. H.
Source :
Phys. Rev. D 100, 052004 (2019)
Publication Year :
2018

Abstract

This work reports a precise measurement of the reactor antineutrino flux using 2.2 million inverse beta decay (IBD) events collected with the Daya Bay near detectors in 1230 days. The dominant uncertainty on the neutron detection efficiency is reduced by 56% with respect to the previous measurement through a comprehensive neutron calibration and detailed data and simulation analysis. The new average IBD yield is determined to be $(5.91\pm0.09)\times10^{-43}~\rm{cm}^2/\rm{fission}$ with total uncertainty improved by 29%. The corresponding mean fission fractions from the four main fission isotopes $^{235}$U, $^{238}$U, $^{239}$Pu, and $^{241}$Pu are 0.564, 0.076, 0.304, and 0.056, respectively. The ratio of measured to predicted antineutrino yield is found to be $0.952\pm0.014\pm0.023$ ($1.001\pm0.015\pm0.027$) for the Huber-Mueller (ILL-Vogel) model, where the first and second uncertainty are experimental and theoretical model uncertainty, respectively. This measurement confirms the discrepancy between the world average of reactor antineutrino flux and the Huber-Mueller model.<br />Comment: 10 pages, 9 figures, and 2 tables

Subjects

Subjects :
High Energy Physics - Experiment
Physics - Instrumentation and Detectors

Details

Database :
arXiv
Journal :
Phys. Rev. D 100, 052004 (2019)
Publication Type :
Report
Accession number :
edsarx.1808.10836
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevD.100.052004
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