Discoveries of Higgs Particle and Supersymmetry to Pioneer the Particle Physics in the 21st Century

希格斯粒子和超对称性的发现开创了 21 世纪粒子物理学的先河

基本信息

批准号：
16081203
负责人：
KOMAMIYA Sachio
金额：
$ 12.16万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2009
项目状态：
已结题

项目摘要

In the international collaboration of the ATLAS experiment, which is running at the world highest energy proton-proton collider at CERN, our research group made essential contributions towards discoveries of Higgs Boson and Supersymmetry. Namely, physicists and engineers in our group contribited to construct the muon-trigger chambers, silicon tracking devise, superconducting solenoid magnet, and the regional data analysis system based on the GRID technology. The mass limit of supersymmetric gluinos and squarks are already exceeding around 800 GeV, and the Higgs Boson is driven into a small mass range. We expect discoveries of these particles in the near future.The MEG experiment at PSI is searching for a positively charged muon rare decay into positron and gamma. The physicists in our research group proposed the experiment, designed and constructed the major part of the state-of-the-art detector including a liquid Xe calorimeter for gamma, a special superconducting solenoid magnet and very thin drift chambers for positron. Since 2008 the experiment is taking data and the world record upper limit of the muon decay branching fraction into positron+gamma has been established. The theoretical colleagues in our research group made vast contributions in the wide research field from superstring to Higgs/SUSY phenomenology. Also they produced many publications by collaborating with the ATLAS and MEG experimentalists.

在CERN世界最高能量质子对撞机上运行的ATLAS实验的国际合作中，我们的研究小组为希格斯玻色子和超对称性的发现做出了重要贡献。即我们课题组的物理学家和工程师共同构建了μ介子触发室、硅跟踪装置、超导螺线管磁体以及基于GRID技术的区域数据分析系统。超对称胶子和夸克的质量极限已经超过 800 GeV 左右，希格斯玻色子被驱入一个较小的质量范围。我们预计在不久的将来会发现这些粒子。PSI 的 MEG 实验正在寻找带正电的 μ 子稀有衰变成正电子和伽马。我们研究小组的物理学家提出了这个实验，设计并建造了最先进探测器的主要部分，包括用于伽马的液体Xe量热计、特殊的超导螺线管磁体和非常薄的正电子漂移室。自2008年以来，该实验正在获取数据，并建立了正电子+伽马的μ介子衰变分支分数的世界纪录上限。我们研究组的理论同事在从超弦到希格斯/SUSY现象学的广泛研究领域做出了巨大贡献。他们还与 ATLAS 和 MEG 实验人员合作出版了许多出版物。