Measurement of electron antineutrino oscillation with 1958 days of operation at Daya Bay
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Measurement of electron antineutrino oscillation with 1958 days of operation at Daya Bay

  • Author(s): Collaboration, DB
  • Adey, D
  • An, FP
  • Balantekin, AB
  • Band, HR
  • Bishai, M
  • Blyth, S
  • Cao, D
  • Cao, GF
  • Cao, J
  • Chan, YL
  • Chang, JF
  • Chang, Y
  • Chen, HS
  • Chen, SM
  • Chen, Y
  • Chen, YX
  • Cheng, J
  • Cheng, ZK
  • Cherwinka, JJ
  • Chu, MC
  • Chukanov, A
  • Cummings, JP
  • Deng, FS
  • Ding, YY
  • Diwan, MV
  • Dolgareva, M
  • Dwyer, DA
  • Edwards, WR
  • Gonchar, M
  • Gong, GH
  • Gong, H
  • Gu, WQ
  • Guo, L
  • Guo, XH
  • Guo, YH
  • Guo, Z
  • Hackenburg, RW
  • Hans, S
  • He, M
  • Heeger, KM
  • Heng, YK
  • Higuera, A
  • Hsiung, YB
  • Hu, BZ
  • Hu, JR
  • Hu, T
  • Hu, ZJ
  • Huang, HX
  • Huang, XT
  • Huang, YB
  • Huber, P
  • Huo, W
  • Hussain, G
  • Jaffe, DE
  • Jen, KL
  • Ji, XL
  • Ji, XP
  • Johnson, RA
  • Jones, D
  • Kang, L
  • Kettell, SH
  • Koerner, LW
  • Kohn, S
  • Kramer, M
  • Langford, TJ
  • Lebanowski, L
  • Lee, J
  • Lee, JHC
  • Lei, RT
  • Leitner, R
  • Leung, JKC
  • Li, C
  • Li, F
  • Li, HL
  • Li, QJ
  • Li, S
  • Li, SC
  • Li, SJ
  • Li, WD
  • Li, XN
  • Li, XQ
  • Li, YF
  • Li, ZB
  • Liang, H
  • Lin, CJ
  • Lin, GL
  • Lin, S
  • Lin, SK
  • Lin, Y-C
  • Ling, JJ
  • Link, JM
  • Littenberg, L
  • Littlejohn, BR
  • Liu, JC
  • Liu, JL
  • Liu, Y
  • Liu, YH
  • Loh, CW
  • Lu, C
  • Lu, HQ
  • Lu, JS
  • Luk, KB
  • Ma, XB
  • Ma, XY
  • Ma, YQ
  • Malyshkin, Y
  • Marshall, C
  • Caicedo, DAM
  • McDonald, KT
  • McKeown, RD
  • Mitchell, I
  • Lepin, LM
  • Napolitano, J
  • Naumov, D
  • Naumova, E
  • Ochoa-Ricoux, JP
  • Olshevskiy, A
  • Pan, H-R
  • Park, J
  • Patton, S
  • Pec, V
  • Peng, JC
  • Pinsky, L
  • Pun, CSJ
  • Qi, FZ
  • Qi, M
  • Qian, X
  • Qiu, RM
  • Raper, N
  • Ren, J
  • Rosero, R
  • Roskovec, B
  • Ruan, XC
  • Steiner, H
  • Sun, JL
  • Tang, W
  • Taychenachev, D
  • Treskov, K
  • Tse, W-H
  • Tull, CE
  • Viren, B
  • Vorobel, V
  • Wang, CH
  • Wang, J
  • Wang, M
  • Wang, NY
  • Wang, RG
  • Wang, W
  • Wang, W
  • Wang, X
  • Wang, YF
  • Wang, Z
  • Wang, Z
  • Wang, ZM
  • Wei, HY
  • Wei, LH
  • Wen, LJ
  • Whisnant, K
  • White, CG
  • Wise, T
  • Wong, HLH
  • Wong, SCF
  • Worcester, E
  • Wu, Q
  • Wu, WJ
  • Xia, DM
  • Xing, ZZ
  • Xu, JL
  • Xue, T
  • Yang, CG
  • Yang, H
  • Yang, L
  • Yang, MS
  • Yang, MT
  • Yang, YZ
  • Ye, M
  • Yeh, M
  • Young, BL
  • Yu, HZ
  • Yu, ZY
  • Yue, BB
  • Zeng, S
  • Zhan, L
  • Zhang, C
  • Zhang, CC
  • Zhang, FY
  • Zhang, HH
  • Zhang, JW
  • Zhang, QM
  • Zhang, R
  • Zhang, XF
  • Zhang, XT
  • Zhang, YM
  • Zhang, YM
  • Zhang, YX
  • Zhang, YY
  • Zhang, ZJ
  • Zhang, ZP
  • Zhang, ZY
  • Zhao, J
  • Zheng, P
  • Zhou, L
  • Zhuang, HL
  • Zou, JH
  • et al.
Creative Commons Attribution 4.0 International Public License
Abstract

We report a measurement of electron antineutrino oscillation from the Daya Bay Reactor Neutrino Experiment with nearly 4 million reactor $\overline{\nu}_{e}$ inverse beta decay candidates observed over 1958 days of data collection. The installation of a Flash-ADC readout system and a special calibration campaign using different source enclosures reduce uncertainties in the absolute energy calibration to less than 0.5% for visible energies larger than 2 MeV. The uncertainty in the cosmogenic $^9$Li and $^8$He background is reduced from 45% to 30% in the near detectors. A detailed investigation of the spent nuclear fuel history improves its uncertainty from 100% to 30%. Analysis of the relative $\overline{\nu}_{e}$ rates and energy spectra among detectors yields $\sin^{2}2\theta_{13} = 0.0856\pm 0.0029$ and $\Delta m^2_{32}=(2.471^{+0.068}_{-0.070})\times 10^{-3}~\mathrm{eV}^2$ assuming the normal hierarchy, and $\Delta m^2_{32}=-(2.575^{+0.068}_{-0.070})\times 10^{-3}~\mathrm{eV}^2$ assuming the inverted hierarchy.

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