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Flavor physics in supersymmetric models

超对称模型中的风味物理

基本信息

批准号：
13640309
负责人：
OKADA Yasuhiro
金额：
$ 2.43万
依托单位：
High Energy Accelerator Research Organization (2004)The High Energy Accelerator Research Organization (2001-2003)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2004
项目状态：
已结题

项目摘要

1. B Physics in supersymmetric modelsCP violation and Flavor changing neutral current processes in B meson decays provide an indirect but powerful method to search for new particles and new interactions beyond the Standard Model. In this research, various B decay observable quantities are calculated in supersymmetrc models based on grand unification and flavor symmetry, and clarify how to distinguish different models by combining various B observables. In addition, B decay processes including final tau particles, which is sensitive to existence of a charged Higgs boson, are evaluated including quantum corrections due to supersymmetric particles. The results of these researches are used for KEK and SLAC efforts of Super B Factory planning.2. Phenomenology of lepton flavor violating processes.Search for lepton flavor violation is another important way to look for new physics effects in flavor physics. Here, we develop phenomenology of tau lepton flavor violation and mu-e conversion in nuclei in general framework. Furthermore, muon lepton flavor violating processes are calculated in supersymmetric see-saw model, and it is pointed out that the mu-e conversion process is particularly important in a special parameter region.3. Physics of Higgs particleHiggs physics will become a central issue in particle physics in coining years. Here, we consider measurement of the Higgs potential in future electron positron linear collider experiments, and clarify its meanings in new physics search and electroweak baryogenesis by studying examples of a two Higgs doublet model and a supersymmetric model.

1.超对称模型中的B物理B介子衰变中的CP破坏和变味中性流过程为在标准模型之外寻找新粒子和新相互作用提供了一种间接而有力的方法。在这项研究中，计算了基于大统一和味道对称性的超对称模型中的各种B衰变可观测量，并阐明了如何通过组合各种B衰变可观测量来区分不同的模型。此外，还研究了对带电Higgs玻色子敏感的B衰变过程，包括超对称粒子的量子修正。这些研究成果可用于超B工厂的KEK和SLAC规划。轻子味破坏过程的现象学。研究轻子味破坏是在味物理学中寻找新的物理效应的另一个重要途径。在这里，我们在一般框架下发展了原子核中的轻子味破坏和模电子转换的现象学。在此基础上，计算了超对称拉锯模型中的介子轻子味破坏过程，并指出在一个特殊的参数区域内，u-e转换过程尤为重要。希格斯粒子物理学在未来的几年里，希格斯物理学将成为粒子物理学的中心问题。在这里，我们考虑在未来的电子正电子线性对撞机实验中测量希格斯势，并通过研究两个希格斯双重态模型和一个超对称模型的例子来阐明它在新物理研究和弱电重子发生中的意义。