中微子振荡中的几何相位和CP违反  

The Geometric Phase and CP-Violation in Neutrino Oscillation

作　　者：江春宇 曾高荣[1] 黄永畅[2] 王资生[1] JIANG Chunyu;ZENG Gaorong;HUANG Yongchang;WANG Zisheng(College of Physics and Communication Electronics,Jiangxi Normal University,Nanchang Jiangxi 330022,China;Institute of Theoretical Physics,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]江西师范大学物理与通信电子学院,江西南昌330022 [2]北京工业大学理论物理研究所,北京100124

出　　处：《江西师范大学学报（自然科学版）》2020年第4期366-372,共7页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金(11565015);江西省教育厅科技课题(GJJ160304)资助项目.

摘　　要：该文首先探讨了模型化的中微子在物质中振荡和混合的分析解,然后让中微子的CP违反相位旋转360°获得中微子振荡和混合的几何相位,发现几何相位随能量的振动具有非对称性几何结构.几何相位是描述中微子传播过程中内禀属性,故这种非对称结构起源于中微子振荡和混合的CP违反现象.因此,几何相位为中微子传播过程中的CP违反现象提供了线索.Firstly,the analytical solution for a model of neutrino oscillation and mixing in the matter is explored.Then,the CP-violation phase of the neutrino is operated to rotate a circle in order to obtain the geometric phase of the neutrino oscillation and mixing.It is found that the geometric phase with energy vibration has asymmetric geometric structure,where the wave peaks and dips are not symmetry.Because the geometric phase describes the intrinsic properties of neutrino propagation process,this asymmetric structure originates from the neutrino oscillation and mixed CP-violation phenomenon.Therefore,the geometric phase provides clues to CP violations during neutrino propagation.

关 键 词：中微子 中微子振荡 几何相位 几何结构 CP违反 

分 类 号：O572.31[理学—粒子物理与原子核物理]