Exploring supersymmetry and its breaking with flavor physics

最小的超重力模型，超对称SU（5）用右手处理的神经三位一体的大型统一模型，和用U（2）香味对称正在按顺序研究以探索香味结构的超对称破坏。在这些模型中，对香味物理学相关的几个过程进行了分析。在夸克区，我们考察了B_d-B_d混合物、B_3-B_5混合物、K^0-K ^0混合物、B_d → Σ K_s、b→Sγ和b→dγ中的CP破坏。As for the lepton sector， we calculated branching ratios of decay processes such as μ→eγ， τ→μγ， and τ→eγ。我们在我们的研究中找到了像最近实验结果一样的中性生长，我们的研究没有揭示下面的事实。该最低限度的超重力模型展示了虚拟没有新的香味现象，并且该模型的允许参数区域受到严格约束，在B-s-R ^中混合物的最近实验结果将其添加到其他实验边界。标准模型中的物质配置可能在超对称SU（5）大统一模型中。如果是右手处理的中性神经质，那么右手处理的中性神经质就不被淘汰了。Moreover，Lepton扇区中的香味信号显示了这个模型中的几种模式，依赖于标量Lepton扇区中的混合。作为与U（2）香味对称性模型的超对称性，许多香味信号可能与标准模型有明显的差异，对该模型的预测也有很大的关系。在上面的研究中添加，我们研究了电荷希格斯玻色子对半态B衰变和中性混合对宇宙中性核背景的相互作用的影响的研究。matter。

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.