Explorations of the Universe with the BABAR and LSST Experiments

该奖项使斯坦福大学由首席研究员Patricia Burchat领导的小组能够最大限度地发挥其在SLAC的BABAR实验投资的长期效益，并通过拟议的大型天气巡天望远镜（LSST）为观测宇宙学的新努力做出贡献。该项目的智力价值在于寻找改进粒子物理学标准模型（SM）的方法。SM没有解决“等级”问题，它的粒子含量也不包含宇宙中暗物质的候选物质。在B工厂对底部、魅力和tau衰变进行的高度敏感的搜索和精确研究，对任何为解决SM缺陷而引入的模型都施加了严格的限制。斯坦福大学的研究小组将对BABAR的最终数据样本进行分析，这些分析结果将有助于定义描述宇宙的理论。斯坦福大学的研究小组将完成正在进行的对稀有或禁止粲子和B衰变的新物理学的研究，对B - ro -pi进行最终的时间相关的达利茨图分析，以提取CKM角alpha，开始研究阐明最近观察到的但令人困惑的类粲子状态的性质，并继续在组织模拟数据样本的生产中发挥重要作用，这些模拟数据样本需要在BABAR中进行所有物理分析。一个基于LSST的项目的启动将使该小组能够将引力透镜作为一种对宇宙中所有物质——重子和暗物质——都敏感的宇宙探测器来研究。斯坦福小组一直专注于LSST之前的天文数据集（特别是来自8米斯巴鲁望远镜的深星系团图像），以获得“管道”开发所需的技术经验，用于分析引力透镜，特别是光度学和星系形状的测量，以及与系统不确定性相关的研究，这些不确定性可能会限制LSST对宇宙学的灵敏度。更广泛的影响包括参与与高能物理数据保存和长期分析有关的问题的实验间研究，特别是针对BaBar数据集。作为这项工作的一部分，斯坦福大学的研究小组正专注于如何优化长期数据存储和访问，以促进推广和教育，使公众、高中学生和教师、大学水平的粒子物理课程的学生以及未来粒子物理研究生的培训受益。原型格式和教程正在设计和开发中，并将在由PI教授的粒子物理课程中进行测试。此外，旨在增加和多样化接受物理教育的学生群体的活动将继续进行。

This award enables the Stanford University group led by Principle Investigator Patricia Burchat to maximize the long-term benefit of its investment in the BABAR experiment at SLAC and contribute to a new effort in observational cosmology through the proposed Large Synoptic Survey Telescope (LSST). The intellectual merit of the project follows from searching for ways to improve the Standard Model (SM) of particle physics. The SM does not address the "hierarchy" problem and its particle content does not contain a candidate for the dark matter in the Universe. The highly sensitive searches and precision studies conducted with bottom, charm and tau decays at the B Factories impose severe constraints on any model that is introduced to address the deficiencies of the SM. The analyses that will be conducted by the Stanford group on the final BABAR data sample will leave a legacy of results that will help define the theories that are developed to describe the universe. The Stanford group will complete ongoing searches for new physics in rare or forbidden charm and B decays, conduct the final time-dependent Dalitz-plot analysis of B - rho-pi to extract the CKM angle alpha, begin studies to elucidate the nature of recently observed but perplexing charmonium-like states, and continue to play a significant role in organizing the production of the simulated data samples needed to carry out all physics analyses in BABAR. The initiation of a program based on the LSST will enable the group to study gravitational lensing as a cosmological probe which is sensitive to all matter in the universe - baryonic and dark matter. The Stanford group has been focusing on pre-LSST astronomical data sets (in particular, images of deep galaxy clusters from the 8-meter Subaru telescope) to gain technical experience in "pipeline" development needed for analysis of gravitational lensing, especially photometry and the measurement of galaxy shapes, and studies related to systematic uncertainties that will potentially limit the sensitivity of LSST for cosmology. Broader impacts include participation in an inter-experiment study of issues related to data preservation and long-term analysis in high energy physics, particularly directed to the BaBar data set. As part of this effort, the Stanford group is focusing on how long-term data storage and access can be optimized for outreach and education to benefit the general public, high school students and teachers, students in college-level particle physics courses, and the training of future graduate students in particle physics. Prototype formats and tutorials are being designed and developed, and will be tested in a particle physics course taught by the PI. In addition, activities aimed at increasing and diversifying the cohort of students who receive a physics education will continue.