Broken S-3L x S-3R flavor symmetry and leptonic CP violation | |
Zhou S(周顺); Zhou, Shun; Si, Zong-guo; Yang, Xing-hua | |
刊名 | CHINESE PHYSICS C中国物理. C |
2017 | |
卷号 | 41期号:11页码:113105 |
关键词 | canonical seesaw model S-3L x S-3R flavor symmetry leptonic CP violation cosmological matter-antimatter asymmetry resonant leptogenesis |
ISSN号 | 1674-1137 |
DOI | 10.1088/1674-1137/41/11/113105 |
文献子类 | Article |
英文摘要 | In the framework of the canonical seesaw model, we present a simple but viable scenario to explicitly break an S-3L x S-3R flavor symmetry in the leptonic sector. It turns out that the leptonic flavor mixing matrix is completely determined by the mass ratios of the charged leptons (i.e., m(e)/m(mu) and m(mu)/m(tau)) and those of light neutrinos (i.e., m(1)/m(2) and m(2)/m(3)). The latest global-fit results of the three neutrino mixing angles {theta(12), theta(13), theta(23)} and two neutrino mass-squared differences {Delta m(21)(2),Delta m(31)(2)}g at the 3 sigma level are used to constrain the parameter space of {m(1)/m(2), m(2)/m(3) g. The predictions for the mass spectrum and flavor mixing are highlighted: (1) the neutrino mass spectrum shows a hierarchical pattern and a normal ordering, e.g., m(1) approximate to 2.2 meV, m(2) approximate to 8.8 meV and m(3) approximate to 52.7 meV; (2) only the first octant of theta(23) is allowed, namely, 41.8 degrees less than or similar to theta(23) less than or similar to 43.3 degrees; (3) the Dirac CP-violating phase delta approximate to -22 degrees deviates significantly from the maximal value -90 degrees. All these predictions are ready to be tested in ongoing and forthcoming neutrino oscillation experiments. Moreover, we demonstrate that the cosmological matter-antimatter asymmetry can be explained via resonant leptogenesis, including the individual lepton-flavor effects. In our scenario, leptonic CP violation at low-and high-energy scales is closely connected. |
WOS关键词 | MASS MATRIX ; RESONANT LEPTOGENESIS ; UNIVERSAL STRENGTH ; MAJORANA NEUTRINOS ; YUKAWA COUPLINGS ; CABIBBO ANGLES ; QUARK MASSES ; HIERARCHY ; DEMOCRACY ; MIXINGS |
WOS研究方向 | Physics |
语种 | 英语 |
CSCD记录号 | CSCD:6092451 |
WOS记录号 | WOS:000414482100006 |
内容类型 | 期刊论文 |
源URL | [http://ir.ihep.ac.cn/handle/311005/284584] |
专题 | 高能物理研究所_理论物理室 |
作者单位 | 中国科学院高能物理研究所 |
推荐引用方式 GB/T 7714 | Zhou S,Zhou, Shun,Si, Zong-guo,et al. Broken S-3L x S-3R flavor symmetry and leptonic CP violation[J]. CHINESE PHYSICS C中国物理. C,2017,41(11):113105. |
APA | 周顺,Zhou, Shun,Si, Zong-guo,&Yang, Xing-hua.(2017).Broken S-3L x S-3R flavor symmetry and leptonic CP violation.CHINESE PHYSICS C中国物理. C,41(11),113105. |
MLA | 周顺,et al."Broken S-3L x S-3R flavor symmetry and leptonic CP violation".CHINESE PHYSICS C中国物理. C 41.11(2017):113105. |
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