Broken S-3L x S-3R flavor symmetry and leptonic CP violation

doi:10.1088/1674-1137/41/11/113105

	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.