Observation of Electron-Antineutrino Disappearance at Daya Bay
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- 23 April 2012
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 108 (17) , 171803
- https://doi.org/10.1103/physrevlett.108.171803
Abstract
The Daya Bay Reactor Neutrino Experiment has measured a nonzero value for the neutrino mixing angle with a significance of 5.2 standard deviations. Antineutrinos from six 2.9 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 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 . A rate-only analysis finds in a three-neutrino framework.
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Funding Information
- U.S. Department of Energy
- National Science Foundation
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