摘要
中微子振荡是目前唯一超出粒子物理标准模型的新现象,它证明了中微子质量不为零,对粒子物理、天体物理与宇宙学均有非常重要的意义.在描述中微子振荡的6个参数中,目前仍有两个未知:交叉混合角θ13与CP相角δ.作者建议在大亚湾反应堆附近建设一个中微子实验站,测量混合角sin22θ13在90%的置信度下达到0.01的精度,较过去的实验提高近一个数量级.这将对中微子物理的未来发展提供方向性指导,特别是对理解宇宙中“反物质消失之谜”具有重要意义.
Neutrino oscillation is the only phenomenon currently known beyond the standard model of particle physics. It proves that the neutrino mass is not null, a conclusion extremely important to particle physics, astrophysics and cosmology. Among the six parameters for describing neutrino oscillations, two are still unknown： the mixing angle θ13 and the CP phase δ. We propose to build an experiment near the Daya Bay nuclear power station to measure the mixing angle sin^22θ13 to a precision of 0.01 at 90% confidence level, an improvement of about one order of magnitude over past experiments. This will provide a guideline for the future development of neutrino physics, and in particular for the understanding of the absence of anti-matter in the universe.
出处
《物理》
CAS
北大核心
2007年第3期207-214,共8页
Physics
基金
国家重点基础研究计划(批准号:2006CB808100)
国家自然科学基金(批准号:10225524
10535050
10475086)
中国科学院百人计划及专项基金资助项目
关键词
中微子
探测器
振荡
混合
反物质
neutrino, detector, oscillation, mixing,anti-matter
