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篇目详细内容 |
【篇名】 |
Overview on neutrinos and the Daya Bay experiment |
【刊名】 |
Frontiers of Physics |
【刊名缩写】 |
Front. Phys |
【ISSN】 |
2095-0462 |
【EISSN】 |
2095-0470 |
【DOI】 |
10.1007/s11467-013-0296-x |
【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
【出版年】 |
2013 |
【卷期】 |
8
卷3期 |
【页码】 |
242-247
页,共
6
页 |
【作者】 |
Miao He;
|
【关键词】 |
neutrino oscillation; neutrino mixing; Daya Bay |
【摘要】 |
Neutrinos are elementary particles in the Standard Model. Neutrino oscillation is a quantum mechanical phenomenon beyond the Standard Model. Neutrino oscillation can be described by two independent mass-squared di.erences , (or ) and a3×3 unitary matrix, containing three mixing angles θ12, θ23, θ13, and one charge-parity (CP) phase. θ12 is about 34° and determined by solar neutrino experiments and the reactor neutrino experiment KamLAND. θ23 is about 45° and determined by atmospheric neutrino experiments and accelerator neutrino experiments. θ13 can be measured by either accelerator or reactor neutrino experiments. On Mar. 8, 2012, the Daya Bay Reactor Neutrino Experiment reported the .rst observation of non-zero θ13 with 5.2 standard deviations. In June, with 2.5× previous data, Daya Bay improved the measurement of sin2 2 θ13 = 0.089±0.010(stat)±0.005(syst). |
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