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题名: Common origin of soft mu-tau and CP breaking in neutrino seesaw and the origin of matter
作者: Ge, Shao-Feng ;  He, Hong-Jian ;  Yin, Fu-Rong
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2010
期号: 5, 页码:-
关键词: QUARK MASS MATRICES ;  THERMAL LEPTOGENESIS ;  BARYON ASYMMETRY ;  NON-CONSERVATION ;  VIOLATION ;  MODEL ;  BARYOGENESIS ;  EQUATIONS ;  UNIVERSE ;  MIXINGS
学科分类: Physics
通讯作者: Ge, SF , Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China
部门归属: [Ge, SF] Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China; Tsinghua Univ, Inst Modern Phys, Beijing 100084, Peoples R China; Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
英文摘要: Neutrino oscillation data strongly support mu-tau symmetry as a good approximate flavor symmetry of the neutrino sector, which has to appear in any viable theory for neutrino mass-generation. The mu-tau breaking is not only small, but also the source of Dirac CP-violation. We conjecture that both discrete mu-tau and CP symmetries are fundamental symmetries of the seesaw Lagrangian (respected by interaction terms), and they are only softly broken, arising from a common origin via a unique dimension-3 Majorana mass-term of the heavy right-handed neutrinos. From this conceptually attractive and simple construction, we can predict the soft mu-tau breaking at low energies, leading to quantitative correlations between the apparently two small deviations theta(23)-45 degrees and theta(13)-0 degrees. This nontrivially connects the on-going measurements of mixing angle theta(23) with the upcoming experimental probes of theta(13). We find that any deviation of theta(23)-45 degrees must put a lower limit on theta(13). Furthermore, we deduce the low energy Dirac and Majorana CP violations from a common soft-breaking phase associated with mu-tau breaking in the neutrino seesaw. Finally, from the soft CP breaking in neutrino seesaw we derive the cosmological CP violation for the baryon asymmetry via leptogenesis. We fully reconstruct the leptogenesis CP-asymmetry from the low energy Dirac CP phase and establish a direct link between the cosmological CP-violation and the low energy Jarlskog invariant. We predict new lower and upper bounds on the theta(13) mixing angle, 1 degrees less than or similar to theta(13) <= 6 degrees. In addition, we reveal a new hidden symmetry that dictates the solar mixing angle theta(12) by its group-parameter, and includes the conventional tri-bimaximal mixing as a special case, allowing deviations from it.
资助者: NSF of China[10625522, 10635030]; National Basic Research Program of China[2010CB833000]; Tsinghua University; Kavli Institute for Theoretical Physics China (KITPC); China Scholarship Council
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000279490800023
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5118
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Ge, Shao-Feng,He, Hong-Jian,Yin, Fu-Rong. Common origin of soft mu-tau and CP breaking in neutrino seesaw and the origin of matter[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(5):-.
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