U.S.-Japan Cooperative Research: Data Analysis of FermiLab Experiment E-653 and Measurement of the Oscillat#ins of Muon Neutrinos into Tau-Neutrinos

该奖项将支持由内维尔·W·雷伊教授领导的俄亥俄州立大学物理系科学家与由Kimio Niwa教授领导的日本名古屋大学科学家之间的持续合作。这个项目的目标是继续研究理论物理中共同感兴趣的领域，即B介子衰变中的混合和CP破坏，以及标准模型以外的电弱理论的规范结构。这两个小组之间的合作在过去十年里一直在继续，他们过去的活动在魅力物理学方面取得了几个重要成果。这项奖励将为完成费米实验室实验E653的分析提供支持。E653有关于魅力粒子的半轻子衰变的非常重要的数据。这些衰变是测量K-M矩阵的关键，K-M矩阵是基本粒子物理学中最基本的量之一。目前，现有的半轻子衰变数据令人困惑，而E653数据可以直接解决这些问题。它还打算进行一项混合乳胶实验(费米实验室P803)，以测量Muon-中微子到Tau-中微子的振荡，这可能决定Tau-中微子是否是宇宙中长期追逐的暗物质。对P803效应的观察将对我们对粒子物理的理解产生重大影响。这两个集团之间的合作由来已久，而且取得了成功，美国和日本的集团都在所涉及的技术方面展示了很高的能力。美国和日本参与者的优势是互补的。美国和日本科学家都在费米实验室收集了该项目的数据，并进行了一些电子学分析。乳剂的分析和额外的电子分析在日本进行。如果该项目成功，研究结果将引起粒子物理界的极大科学兴趣。

This award will provide support for continuing collaboration between scientists from the Department of Physics, Ohio State University, lead by Professor Neville W Reay, and scientists from Nagoya University, Japan, lead by Professor Kimio Niwa. The objectives of this project are to continue to investigate areas in theoretical physics of mutual interest, namely mixing and CP violation in the decays of B-mesons and the gage structure of electro-weak theories beyond the standard model. Collaboration between these two groups has continued for the last decade and their past activities have produced several important results in charm physics. This award will provide support for the completion of the analysis of the Fermilab experiment E653. E653 has very important data on the semileptonic decays of charmed particles. These decays are the key to measuring the K-M matrix, one of the most fundamental quantities in elementary particle physics. At the present time the existing semileptonic decays data is confusing and the E653 data can bear directly on resolving these issues. It is also intended to undertake a hybrid emulsion experiment (Fermilab P803) to measure the oscillation of Muon-neutrinos into Tau-neutrinos, which could decide whether Tau-neutrinos are the long sought after dark matter in the universe. The observation of an effect on P803 would have a dramatic effect on our understanding of particle physics. The collaboration between these two groups is long-standing and successful, and both the US and Japanese groups have demonstrated a high competence in the techniques involved. The strengths of the US and Japanese participants are complementary. Collection of data by both U.S. and Japanese scientists on the project is done at Fermilab, together with some of the electronics analysis. Analysis of emulsions and additional electronic analysis is carried out in Japan. If the project is successful, the results of the research will be of great scientific interest to the particle physics community.