Heavy Flavor Physics

对重夸克味的研究使我们对物质的基本相互作用和对称性有了重要的了解。 它提供了一个独特而强大的工具来寻找粒子和相互作用的标准模型所没有描述的新物理。最终，它可能会导致答案，或至少提供重要的提示，在科学中的一些最基本的问题，如宇宙中的物质反物质不对称性的来源。这个研究小组已经发现，高超的顶点分辨率和粒子识别FOCUS是重夸克研究的关键。费米实验室的BTeV实验将具备这些能力，并将使他们能够在产生大量B介子和重子的Tevatron前沿区域继续他们的物理目标。在本提案所涵盖的期间，该小组将完成对费米实验室光生实验FOCUS的魅力数据的分析。在本提案涵盖的时期内，该小组将继续致力于利用魅力衰变寻找新物理、利用半轻子魅力衰变作为了解强有力之谜的窗口、绘制激发魅力介子光谱以及了解魅力光生。范德比尔特在费米实验室第二代B工厂BTeV中发挥着主导作用。 BTeV的设计是为了精确测量魅力和美丽衰变，以挑战标准模型对CP破坏，混合和稀有衰变的解释。 他们还领导了BTeV的网格计算基础设施和离线计算资源的开发，并领导了一个研究小组，该小组正在为BTeV触发和数据采集系统开发故障自适应框架。范德比尔特与计算机科学家的合作努力正在为实时嵌入式系统（如BTeV触发器）开发故障自适应框架方面开辟新天地，这是一个独特的规模和复杂性。这项工作的结果将是有用的，在任何领域，需要大规模的，可靠的，实时的系统。 在过去，范德比尔特已经受益匪浅，在我们的计划本科生的参与。 在过去的补助金所涵盖的时期，九名本科生作出了重大贡献，我们的计划。在赠款所涉期间，将继续开展这一水平的活动。 最后，该小组正在为其当地QuarkNet中心的活动做出重大贡献，该中心涉及高能物理研究的几位高中教师，并协助他们为他们的班级开发课程和实验。

The study of heavy quark flavors has yielded significant insight into the fundamental interactions and symmetries of matter. It provides a unique and powerful tool to search for new physics not described by the Standard Model of particles and interactions. Eventually, it may lead to answers, or at least provide important hints, to some of the most fundamental questions in science such as the source of the matter anti-matter asymmetry in the universe.This research group has found that the superb vertex resolution and particle identification of FOCUS are crucial for heavy quark studies. The BTeV experiment at Fermilab will have these capabilities, and will allow them to continue their physics objectives in the forward region at the Tevatron where B mesons and baryons are copiously produced.During the period covered by this proposal, the group will finish its analyses of charm data from the Fermilab photoproduction experiment FOCUS. In the period covered by this proposal, the group will pursue its ongoing interests in using charm decays to search for new physics, using semileptonic charm decay as a window into the mysteries of the strong force, mapping out excited charm meson spectroscopy, and understanding charm photoproduction.Vanderbilt is playing a leading role on BTeV, the second generation B-factory at Fermilab. BTeV is designed to make precision measurements of charm and beauty decays in order to challenge the Standard Model explanation of CP violation, mixing, and rare decays. They are also leading the development of a Grid computing infrastructure and off-line computing resources for BTeV, and heading up a research group that is developing a fault adaptive framework for the BTeV trigger and data acquisition system.Broader Impact: Vanderbilt's collaborative efforts with computer scientists are breaking new ground in the development of fault adaptive frameworks for real-time embedded systems such as the BTeV trigger, which is at a unique scale and complexity. The results of this work will be useful in any area that requires large scale, reliable, real-time systems. In the past, Vanderbilt has benefited greatly from the participation of undergraduates in our program. During the period covered by the past grant, nine undergraduates made significant contributions to our program. This level of activity will continue during the period covered by this grant. Finally, the group is contributing significantly to the activities of its local QuarkNet center, which involves several high school teachers in high energy physics research and assists them with the development of curriculum and experiments for their classes.