| Literature DB >> 35939015 |
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 Chen1,8, Y X Chen9, J Cheng9, 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, D A Dwyer17, J P Gallo18, M Gonchar15, G H Gong7, H Gong7, W Q Gu3, J Y Guo1, L Guo7, X H Guo19, Y H Guo20, Z Guo7, R W Hackenburg3, S Hans3, M He5, K M Heeger21, Y K Heng5, Y K Hor1, Y B Hsiung4, B Z Hu4, J R Hu5, T Hu5, Z J Hu1, H X Huang22, J H Huang5, X T Huang23, 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 Kramer17,30, T J Langford21, J Lee17, 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 Lin17, G L Lin26, S Lin29, J J Ling1, J M Link25, L Littenberg3, B R Littlejohn18, J C Liu5, J L Liu33, J X Liu5, C Lu34, H Q Lu5, K B Luk17,30, B Z Ma23, X B Ma9, X Y Ma5, Y Q Ma5, R C Mandujano12, C Marshall17, K T McDonald34, R D McKeown35,36, Y Meng33, J Napolitano28, D Naumov15, E Naumova15, T M T Nguyen26, J P Ochoa-Ricoux12, A Olshevskiy15, H-R Pan4, J Park25, S Patton17, J C Peng16, C S J Pun31, F Z Qi5, M Qi37, X Qian3, N Raper1, J Ren22, C Morales Reveco12, R Rosero3, B Roskovec14, X C Ruan22, H Steiner17,30, J L Sun38, T Tmej14, K Treskov15, W-H Tse10, C E Tull17, B Viren3, V Vorobel14, C H Wang6, J Wang1, M Wang23, N Y Wang19, R G Wang5, W Wang1,36, X Wang39, Y Wang37, Y F Wang5, Z Wang7, Z Wang7, Z M Wang5, H Y Wei3, L H Wei5, L J Wen5, K Whisnant40, C G White18, H L H Wong17,30, E Worcester3, D R Wu5, Q Wu23, W J Wu5, D M Xia41, 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 Young40, H Z Yu1, Z Y Yu5, B B Yue1, V Zavadskyi15, S Zeng5, Y Zeng1, L Zhan5, C Zhang3, F Y Zhang33, H H Zhang1, J L Zhang37, J W Zhang5, Q M Zhang20, S Q Zhang1, X T Zhang5, Y M Zhang1, Y X Zhang38, 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.
Abstract
This Letter reports the first measurement of high-energy reactor antineutrinos at Daya Bay, with nearly 9000 inverse beta decay candidates in the prompt energy region of 8-12 MeV observed over 1958 days of data collection. A multivariate analysis is used to separate 2500 signal events from background statistically. The hypothesis of no reactor antineutrinos with neutrino energy above 10 MeV is rejected with a significance of 6.2 standard deviations. A 29% antineutrino flux deficit in the prompt energy region of 8-11 MeV is observed compared to a recent model prediction. We provide the unfolded antineutrino spectrum above 7 MeV as a data-based reference for other experiments. This result provides the first direct observation of the production of antineutrinos from several high-Q_{β} isotopes in commercial reactors.Entities:
Year: 2022 PMID： 35939015 DOI： 10.1103/PhysRevLett.129.041801
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.185