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.

本研究的目的是澄清哪些风味结构可以从超弦理论推导出来，并研究它们的现象学含义。最近，提出了几个离散的非阿贝尔风味对称来推导夸克和轻子的实际质量矩阵。然而，它们的起源在四维场论中并不清楚。在2006年，我们澄清了紧化空间的几何结构可以在超弦理论中提供它们的起源，而典型的风味对称可以从杂散轨道模型中出现，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风味对称中实现。此外，当我们考虑超对称理论时，风味对称不仅约束费米子质量矩阵，而且约束它们的超伙伴的质量矩阵，即超对称破缺项。我们还研究了超对称破缺项的特定模式，这些模式是由上述D4味对称预测的。此外，我们还计算了高阶耦合，即它们的模依赖性。我们还研究了模稳定和超对称破缺及其现象学意义。

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

Metastable supersymmetry breaking vacua from conformal dynamics.

亚稳态超对称打破了共形动力学的真空。

• 发表时间: 2008
• 期刊: Physical Review D77
• 作者: K.Hirose et al.;Motoi Endo;K.Hirose 他;K.Akimoto 他;Ryo Takahashi;W.Voegeli 他;Mizue Honda;N.Terasawa 他;Kang-Sin Choi;T.Emoto 他;Hiroyuki Abe
• 通讯作者: Hiroyuki Abe

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

Relaxed fine-tuning in models with nonuniversal gaugino masses

• DOI: 10.1103/physrevd.76.015002
• 发表时间: 2007-03
• 期刊: Physical Review D
• 影响因子: 5
• 作者: H. Abe;Tatsuo C. Kobayashi;Y. Omura

Little SUSY hierarchy in mixed modulus-anomaly mediation

• DOI: 10.1016/j.physletb.2005.11.078
• 发表时间: 2005-08
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: Kiwoon Choi;K. Jeong;Tatsuo C. Kobayashi;Ken-ichi Okumura