학술논문
Antineutrino Energy Spectrum Unfolding Based on the Daya Bay Measurement and Its Applications
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article
Author
collaboration, Daya Bay; An, FP; Balantekin, AB; Band, HR; Bishai, M; Blyth, S; Cao, GF; Cao, J; Chang, JF; Chang, Y; Chen, HS; Chen, SM; Chen, Y; Chen, YX; Cheng, J; Cheng, ZK; Cherwinka, JJ; Chu, MC; Cummings, JP; Dalager, O; Deng, FS; Ding, YY; Diwan, MV; Dohnal, T; Dove, J; Dvorak, M; Dwyer, DA; Gallo, JP; Gonchar, M; Gong, GH; Gong, H; Gu, WQ; Guo, JY; Guo, L; Guo, XH; Guo, YH; Guo, Z; Hackenburg, RW; Hans, S; He, M; Heeger, KM; Heng, YK; Higuera, A; Hor, YK; Hsiung, YB; Hu, BZ; Hu, JR; Hu, T; Hu, ZJ; Huang, HX; Huang, XT; Huang, YB; Huber, P; Jaffe, DE; Jen, KL; Ji, XL; Ji, XP; Johnson, RA; Jones, D; Kang, L; Kettell, SH; Kohn, S; Kramer, M; Langford, TJ; Lee, J; Lee, JHC; Lei, RT; Leitner, R; Leung, JKC; Li, F; Li, JJ; Li, QJ; Li, S; Li, SC; Li, WD; Li, XN; Li, XQ; Li, YF; Li, ZB; Liang, H; Lin, CJ; Lin, GL; Lin, S; Ling, JJ; Link, JM; Littenberg, L; Littlejohn, BR; Liu, JC; Liu, JL; Lu, C; Lu, HQ; Lu, JS; Luk, KB; Ma, XB; Ma, XY; Ma, YQ; Marshall, C; Caicedo, DA Martinez; McDonald, KT; McKeown, RD
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Abstract
The prediction of reactor antineutrino spectra will play a crucial role asreactor experiments enter the precision era. The positron energy spectrum of3.5 million antineutrino inverse beta decay reactions observed by the Daya Bayexperiment, in combination with the fission rates of fissile isotopes in thereactor, is used to extract the positron energy spectra resulting from thefission of specific isotopes. This information can be used to produce aprecise, data-based prediction of the antineutrino energy spectrum in otherreactor antineutrino experiments with different fission fractions than DayaBay. The positron energy spectra are unfolded to obtain the antineutrino energyspectra by removing the contribution from detector response with the Wiener-SVDunfolding method. Consistent results are obtained with other unfolding methods.A technique to construct a data-based prediction of the reactor antineutrinoenergy spectrum is proposed and investigated. Given the reactor fissionfractions, the technique can predict the energy spectrum to a 2% precision. Inaddition, we illustrate how to perform a rigorous comparison between theunfolded antineutrino spectrum and a theoretical model prediction that avoidsthe input model bias of the unfolding method.