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.
- Received 7 March 2012
DOI:https://doi.org/10.1103/PhysRevLett.108.171803
© 2012 American Physical Society
Viewpoint
Rethinking the Neutrino
Published 23 April 2012
The Daya Bay Collaboration in China has discovered an unexpectedly large neutrino oscillation.
See more in Physics