Observation of Electron-Antineutrino Disappearance at Daya Bay

Authors

F. P. AnFollow
J. Z. BaiFollow
G. F. CaoFollow
R. D. McKeown, William & MaryFollow
W. Wang, William & MaryFollow

Document Type

Article

Department/Program

Physics

Journal Title

Physical Review Letters

Pub Date

2012

Volume

108

Issue

17

Abstract

The Daya Bay Reactor Neutrino Experiment has measured a nonzero value for the neutrino mixing angle 0(13) with a significance of 5.2 standard deviations. Antineutrinos from six 2.9 GW(th) 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-GW(th)-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)2 theta(13) = 0.092 +/- 0.016(stat.) +/- 0.005(syst.) in a three-neutrino framework.

Recommended Citation

An, F. P.; Bai, J. Z.; Cao, G. F.; McKeown, R. D.; and Wang, W., Observation of Electron-Antineutrino Disappearance at Daya Bay (2012). Physical Review Letters, 108(17).
10.1103/PhysRevLett.108.171803

DOI

10.1103/PhysRevLett.108.171803