Phenomenology of Superstring Theory ande M-Theory

超弦理论现象学和M理论

• 批准号: 11640246
• 负责人: YAMAGUCHI Masahiro
• 金额: $ 1.86万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640246/
• 关键词: superstring; higher dimensional theory; grand unified theory; supersymmetry; M. theory; 超対称性; 超対称標準模型; 暗黒物質; カルザ・クライン理論; アクシオン; ニュートリノ質量

Recent development of superstring and M-theory has revealed rich structure of space-time. Motivated by this, I have attempted new approaches to various problems in unified theory of particles. In particular, as studies based on higher, dimensional theories, I have made 1. a new proposal to solve problems of grand unified theories by using the phenomenon that chiral fermions can be localized under solitonic background, 2. investigation on models with large extra dimensions and on the Randall-Sundrum extra dimension, 3 phenomenological study on the TeV size extra dimensions where standard-model particles are accessible, especially possible collider signals at the LHC experiment, 4. study on the effective supersymmetry with anomalous U(1) symmetry in the scenario of low-energy string scale, etc. I have also investigated supersymmetric unified theory which is expected to arise as a low-energy effective theory of superstring. In particular, I have studied the supersymmetric contribution to the anomalous magnetic moment of muon whose measurement at Brookhaven experiment had suggested deviation from the standard model prediction. I have also re-examined a classic predition of grand unification, the mass ratio of bottom quark and tau lepton in supersymmetric unified theory. These results have been published as scientific articles or preprints.

超弦理论和M理论的发展揭示了时空的丰富结构。受此启发，我尝试了新的方法来解决粒子统一理论中的各种问题。特别是，作为研究的基础上更高，维理论，我做了1。利用手征费米子在孤子背景下可以局域化的现象解决大统一理论问题的新方案; 2.对具有大额外维度的模型和Randall-Sundrum额外维度的研究，3对标准模型粒子可访问的TeV大小额外维度的唯象研究，特别是LHC实验中可能的对撞机信号，4。研究了低能弦尺度下具有反常U（1）对称性的有效超对称性等。我还研究了有望作为低能有效超弦理论出现的超对称统一理论。特别是，我研究了超对称贡献的μ子的异常磁矩的测量在布鲁克海文实验表明偏离标准模型的预测。本文还重新考察了超对称统一理论中底夸克与τ轻子的质量比这一大统一的经典预言。这些结果已作为科学文章或预印本发表。

项目成果

P.Nath,Y.Yamada and M.Yamaguchi: "Probing the nature of compactification with Kaluza-Klein excitations"Phys. Lett. B. 466. 100 (1999)

P.Nath、Y.Yamada 和 M.Yamaguchi：“利用 Kaluza-Klein 激发探索紧致化的本质”Phys。

S.Chang, S.Tazawa, M.Yamaguchi: "Axion Model in Extra Dimensions with TeV Scale Gravity"Physical Review D. 61. 084005 (2000)

S.Chang、S.Tazawa、M.Yamaguchi：“具有 TeV 尺度重力的额外维度轴子模型”物理评论 D. 61. 084005 (2000)

S. Komine, T. Moroi and M. Yamaguchi: "Recent result from E821 experiment on muon g-2 and unconstrained minimal supersymmetric standard model"Phys. Lett. B.. 506. 93 (2001)

S. Komine、T. Moroi 和 M. Yamaguchi：“μ 子 g-2 和无约束最小超对称标准模型的 E821 实验的最新结果”Phys。

S.Komine,T.Moroi,and M.Yamaguchi: "Recent Result from E821 Experiment on Muon g-2 and Unconstrained Minimal Supersymmetric Standard Model"Physics Letters B. (発表予定).

S. Komine、T. Moroi 和 M. Yamaguchi：“Muon g-2 和无约束最小超对称标准模型 E821 实验的最新结果”Physics Letters B.（即将出版）。

M.Kakizaki, M.Yamaguchi: "Splitting triplet and doublet in extra dimensions"Prog.Theor.Phys.. (発表予定)107・2. (2002)

M.Kakizaki，M.Yamaguchi：“在额外维度中分裂三重态和二重态”Prog.Theor.Phys..（待提交）107・2（2002）