Daya Bay Reactor Neutrino Experiment
Coordinates: The Daya Bay Reactor Neutrino Experiment is a China-based multinational particle physics project studying neutrinos. The multinational collaboration includes researchers from China, the United States, Taiwan, Russia, and the Czech Republic. The US side of the project is funded by the US Department of Energy's Office of High Energy Physics.
It is situated at Daya Bay, approximately 52 kilometers northeast of Hong Kong and 45 kilometers east of Shenzhen. There is an affiliated project in the Aberdeen Tunnel Underground Laboratory in Hong Kong. It measures the neutrons produced by cosmic muons which may affect the Daya Bay Reactor Neutrino Experiment.
The experiment studies neutrino oscillations and is designed to measure the mixing angle θ13 using antineutrinos produced by the reactors of the Daya Bay Nuclear Power Plant and the Ling Ao Nuclear Power Plant. Scientists are also interested in whether neutrinos are CP violators.
This significant result represents a new type of oscillation and is surprisingly large. It is consistent with earlier, but less significant results by T2K, MINOS and Double Chooz. With θ13 so large, NOνA has about a 50% probability of being sensitive to the neutrino mass hierarchy. Experiments may also be able to probe CP violation among neutrinos.
The collaboration produced an updated analysis of their results, which used the energy spectrum to improve the bounds on the mixing angle:
- +0.008 -0.009
At the Neutrino2014 conference, they showed a result using 621 days of data:
- Beijing Normal University
- Brookhaven National Laboratory
- Catholic University of Chile
- California Institute of Technology
- Charles University
- Chengdu University of Technology
- China Guangdong Nuclear Power Group
- China Institute of Atomic Energy
- Chinese Academy of Sciences
- Chinese University of Hong Kong
- College of William and Mary
- Dongguan Institute of Technology
- Illinois Institute of Technology
- Institute of High Energy Physics
- Iowa State University
- Joint Institute for Nuclear Research
- Kurchatov Institute
- Lawrence Berkeley National Laboratory and University of California at Berkeley
- Nanjing University
- Nankai University
- National Chiao-Tung University
- National Taiwan University
- National United University
- Princeton University
- Rensselaer Polytechnic Institute
- Shandong University
- Shanghai Jiao Tong University
- Shenzhen University
- Siena College
- Sun Yat-Sen (Zhongshan) University
- Tsinghua University
- University of California at Los Angeles
- University of Hong Kong
- University of Houston
- University of Illinois at Urbana-Champaign
- University of Science and Technology of China
- University of Wisconsin
- Virginia Polytechnic Institute and State University
- Daya Bay Collaboration (2012). "Observation of electron-antineutrino disappearance at Daya Bay". Physical Review Letters 108 (17): 171803. arXiv:1203.1669. Bibcode:2012PhRvL.108q1803A. doi:10.1103/PhysRevLett.108.171803.
- Adrian Cho (8 March 2012). "Physicists in China Nail a Key Neutrino Measurement". ScienceNow.
- Eugenie Samuel Reich (8 March 2012). Neutrino oscillations measured with record precision. NatureNews. doi:10.1038/nature.2012.10202.
- arXiv:1310.6732v2 [hep-ex]
- Home Page
- Catching neutrinos in China from Symmetry Magazine
- Daya Bay θ13 Reactor Neutrino Experiment & Aberdeen Cosmic Ray Muon-induced Neutron Experiment from Department of Physics, The Chinese University of Hong Kong