String-derived flavor structures and their phenomenological aspects

弦衍生的风味结构及其现象学方面

• 批准号: 17540251
• 负责人: KOBAYASHI Tatsuo
• 金额: $ 1.33万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17540251/
• 关键词: superstring theory; flavor symmetry; supersymmetry breaking; moduli stabilization; 素粒子論; 質量行列; 弦理論; 超対称性; 素

The purpose of this research is to clarify which flavor structures can be derived from superstring theory and to study their phenomenological implications.Recently, several discrete non-Abelian flavor symmetries were proposed to derive realistic mass matrices for quarks and leptons. However, their origins are not clear in 4D field theories. In 2006, we clarified that geometrical structure of compact space can provide their origins in superstring theories and typical flavor symmetries, which can appear from heterotic orbifold models, are D4 and Delta(54). In 2007, using these results, we studied which types of quark/lepton mass matrices can be realized from D4 flavor symmetries. Furthermore, when we consider supersymmetric theories, flavor symmetries constrain not only fermion mass matrices, but also mass matrices of their superpartners, i.e. supersymmetry breaking terms. We also studied specific patterns of supersymmetric breaking terms, which are predicted from the above D4 flavor symmetries.In addition, we computed higher order couplings, i.e. their moduli-dependence. We also studied moduli stabilization, and supersymmetry breaking and their phenomenological implications.

这项研究的目的是阐明哪些风味结构可以从超弦理论中推导出来，并研究它们的现象学含义。最近，提出了几种离散的非阿贝尔风味对称性，以导出夸克和轻子的真实质量矩阵。然而，它们在 4D 场论中的起源尚不清楚。 2006年，我们阐明了紧致空间的几何结构可以在超弦理论中提供它们的起源，并且可以从异质轨道模型中出现的典型风味对称性是D4和Delta(54)。 2007 年，利用这些结果，我们研究了哪些类型的夸克/轻子质量矩阵可以从 D4 风味对称性实现。此外，当我们考虑超对称理论时，风味对称性不仅约束费米子质量矩阵，还约束其超级伙伴的质量矩阵，即超对称破缺项。我们还研究了超对称破缺项的特定模式，这些模式是根据上述 D4 风味对称性预测的。此外，我们还计算了高阶耦合，即它们的模依赖性。我们还研究了模量稳定性和超对称性破缺及其现象学含义。

项目成果

Flavor structure and coupling selection rule from intersecting D-branes

• DOI: 10.1103/physrevd.72.086003
• 发表时间: 2005-04
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Tetsutaro Higaki;N. Kitazawa;Tatsuo C. Kobayashi;Kei-jiro Takahashi

Stringy orgin of non-Abelian flavor symmetries

非阿贝尔风味对称性的弦起源

• 期刊: Nucl. Phys. B に掲載決定
• 作者: T.Kobayashi;H.P.Nilles;F.Ploger;S.Raby;M.Ratz
• 通讯作者: M.Ratz

R-symmetry, supersymmetry breaking and metastable vacua in global and local supersymmetric theories

• DOI: 10.1088/1126-6708/2007/11/044
• 发表时间: 2007-08
• 期刊: arXiv: High Energy Physics - Theory
• 作者: H. Abe;Tatsuo C. Kobayashi;Y. Omura

Moduli-mixing racetrack model

• DOI: 10.1016/j.nuclphysb.2006.02.034
• 发表时间: 2005-12
• 期刊: Nuclear Physics
• 作者: H. Abe;Tetsutaro Higaki;Tatsuo C. Kobayashi

Discrete symmetries in string models

弦模型中的离散对称性

• 发表时间: 2007
• 作者: T.;Kobayashi;小林 達夫;小林 達夫;小林 達夫
• 通讯作者: 小林 達夫