Observation of electron-antineutrino disappearance at Daya Bay

Observation of electron-antineutrino disappearance at Daya Bay

The Daya Bay Reactor Neutrino Experiment has measured a nonzero value for the neutrino mixing angle θ(13) with a significance of 5.2 standard deviations. Antineutrinos from six 2.9 GWth reactors were detected in six antineutrino detectors deployed in two near (flux-weighted baseline 470 m and 576 m)...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Physical review letters 2012-04, Vol.108 (17), p.171803-171803, Article 171803
Hauptverfasser: An, F P, Bai, J Z, Balantekin, A B, Band, H R, Beavis, D, Beriguete, W, Bishai, M, Blyth, S, Boddy, K, Brown, R L, Cai, B, Cao, G F, Cao, J, Carr, R, Chan, W T, Chang, J F, Chang, Y, Chasman, C, Chen, H S, Chen, H Y, Chen, S J, Chen, S M, Chen, X C, Chen, X H, Chen, X S, Chen, Y, Chen, Y X, Cherwinka, J J, Chu, M C, Cummings, J P, Deng, Z Y, Ding, Y Y, Diwan, M V, Dong, L, Draeger, E, Du, X F, Dwyer, D A, Edwards, W R, Ely, S R, Fang, S D, Fu, J Y, Fu, Z W, Ge, L Q, Ghazikhanian, V, Gill, R L, Goett, J, Gonchar, M, Gong, G H, Gong, H, Gornushkin, Y A, Greenler, L S, Gu, W Q, Guan, M Y, Guo, X H, Hackenburg, R W, Hahn, R L, Hans, S, He, M, He, Q, He, W S, Heeger, K M, Heng, Y K, Hinrichs, P, Ho, T H, Hor, Y K, Hsiung, Y B, Hu, B Z, Hu, T, Huang, H X, Huang, H Z, Huang, P W, Huang, X, Huang, X T, Huber, P, Isvan, Z, Jaffe, D E, Jetter, S, Ji, X L, Ji, X P, Jiang, H J, Jiang, W Q, Jiao, J B, Johnson, R A, Kang, L, Kettell, S H, Kramer, M, Kwan, K K, Kwok, M W, Kwok, T, Lai, C Y, Lai, W C, Lai, W H, Lau, K, Lebanowski, L, Lee, J, Lee, M K P, Leitner, R, Leung, J K C, Leung, K Y
Format: Artikel
Sprache:eng
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The Daya Bay Reactor Neutrino Experiment has measured a nonzero value for the neutrino mixing angle θ(13) with a significance of 5.2 standard deviations. Antineutrinos from six 2.9 GWth reactors were detected in six antineutrino detectors deployed in two near (flux-weighted baseline 470 m and 576 m) and one far (1648 m) underground experimental halls. With a 43,000 ton-GWth-day live-time exposure in 55 days, 10,416 (80,376) electron-antineutrino candidates were detected at the far hall (near halls). The ratio of the observed to expected number of antineutrinos at the far hall is R=0.940±0.011(stat.)±0.004(syst.). A rate-only analysis finds sin(2)2θ(13)=0.092±0.016(stat.)±0.005(syst.) in a three-neutrino framework.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.108.171803