Exploring supersymmetry and its breaking with flavor physics

探索超对称性及其与风味物理学的打破

• 批准号: 15540272
• 负责人: TANAKA Minoru
• 金额: $ 2.24万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15540272/
• 关键词: B meson; Supersymmetry; B factory; charged Higgs boson; B→φKs; SU(S); neutrino oscillation; cosmic neutrino background; ニュートリノ混合; 宇宙ニュートリノ; 暗黒物質; 宇宙背景輻射; B→φKs

The minimal supergravity model, the supersymmetric SU(5) grand unified model with right-handed neu- trinos, and a supersymmetric model with U(2) flavor symmetry were studied in order to explore flavor structure of supersymmetry breaking.Several processes relevant for the flavor physics were analyzed in these models. In the・quark sector, we examined the B_d-B_d mixing, the B_3-B_5, mixing, the CP violation in the K^0-K^0 mixing, B_d→φK_s, b→Sγ, and b→dγ. As for the lepton sector, we calculated branching ratios of decay processes such as μ→eγ, τ→μγ, and τ→eγ. We took into account recent experimental results like the neutrino oscillation in our study.Our research unveiled the following facts. The minimal supergravity model exhibits virtually no new flavor phenomena, and the allowed parameter region of this model is tightly constrained, employing the recent experimental result on the B^s-R^s mixing in addition to other experimental bounds. Substantial deviations from the standard model are possible in the supersymmetric SU(5) grand unified model. with right-handed neutrinos, if the right-handed neutrinos are not degenerated. Moreover, flavor signals in the lepton sector show several patterns in this model, depending on the mixing in the scalar lepton sector. As for the supersymmetric model with U(2) flavor symmetry, though flavor signals may significantly differ from the standard model, the prediction of the model is heavily contingent on details of the model.In addition to the above study, we carried out researches concerning effects of the charged Higgs boson on the semitauonic B decay and implications of the neutrino mixing on the interaction of the cosmic neutrino background with macroscopic matter.

为了探索超对称破缺的风味结构，研究了最小超重力模型、带有右手中微子的超对称SU(5)大统一模型和带有U(2)风味对称性的超对称模型。在这些模型中分析了与风味物理相关的几个过程。在夸克扇区中，我们研究了B_d-B_d混合、B_3-B_5混合、K^0-K^0混合中的CP破坏、B_d→φK_s、b→Sγ和b→dγ。对于轻子部分，我们计算了μ→eγ、τ→μγ、τ→eγ等衰变过程的分支比。我们在研究中考虑了最近的实验结果，例如中微子振荡。我们的研究揭示了以下事实。最小超重力模型实际上没有表现出新的风味现象，并且该模型的允许参数区域受到严格约束，除其他实验范围外还采用了最近的 B^s-R^s 混合实验结果。超对称 SU(5) 大统一模型可能与标准模型有很大偏差。与右手中微子，如果右手中微子没有简并的话。此外，轻子扇区中的风味信号在该模型中显示出多种模式，具体取决于标量轻子扇区中的混合。对于具有U(2)风味对称性的超对称模型，尽管风味信号可能与标准模型存在显着差异，但模型的预测在很大程度上取决于模型的细节。除了上述研究之外，我们还开展了带电希格斯玻色子对半子B衰变的影响以及中微子混合对宇宙中微子背景与宏观相互作用的影响的研究。 事情。

项目成果

Expluring flavor structure of supersymmetry brealcing from rave B decars and the unitarity triausle

从 rave B decars 和幺正性 triausle 探索超对称断裂的风味结构

• 发表时间: 2004
• 期刊: Physical Review D70
• 作者: J.Hewett;J.Hewett(ed.);J.Hewett;T.Goto
• 通讯作者: T.Goto

Exploring flavor structure of supersyrmetry breaking from rare B decays and unitarity triangle

探索打破罕见 B 衰变和酉三角的超对称风味结构

• 发表时间: 2004
• 期刊: Physical Review D70
• 作者: J.Hewett;J.Hewett(ed.);J.Hewett;T.Goto;T.Goto et al.;T.Goto
• 通讯作者: T.Goto

The Discovery Potential of a Super B Factory

超级 B 工厂的发现潜力

• 发表时间: 2005
• 期刊: SLAC-R 709
• 作者: J.Hewett

Exploring flavor structure of supersymmetry breaking from rare B decays and the unitarity triangle

• DOI: 10.1103/physrevd.70.035012
• 发表时间: 2003-06
• 期刊: Physical Review D
• 影响因子: 5
• 作者: T. Goto;Y. Okada;Y. Shimizu;T. Shindou;Minoru Tanaka