Elementary Particle Physics

9972073 Sheldon该提案要求支持Fermilab的FOCUS（E831）合作产生的数据分析。 这些数据包括迄今为止记录的最大的粲衰变样本，比使用该光谱仪的前一次运行增加了15倍。 光谱仪具有出色的顶点和粒子识别功能，这两项功能都是在早期运行经验的基础上进行改进和升级的。 范德比尔特小组负责建造、操作、解释和模拟一个新的外层μ介子系统，并对μ介子的识别进行了升级。 该小组还负责实施多重性触发机制。新的数据集应该允许研究标准模型之外的物理主题，例如通过半轻子衰变的D-零D-零棒混合，罕见和禁止的魅力衰变（味道改变中性流，轻子数违反和轻子族数违反衰变），以及CP违反魅力衰变。 该小组还参与了费米实验室C 0区拟议的BTeV计划的研发工作，该计划旨在作为第三代B物理实验，特别是PI已被选中领导μ子探测器的工作。

9972073SheldonThis proposal requests support for the analysis of data produced by the FOCUS (E831) collaboration at Fermilab. The data include the largest sample of charm decays recorded to date, an increase of a factor of fifteen over the previous run with this spectrometer. The spectrometer features excellent vertexing and particle identification, both of which had been refined and upgraded on the basis of experience with earlier runs. Muon identification was upgraded by the Vanderbilt group which assumed primary responsibility for construction, operation, interpretation, and simulation of a new outer muon system. This group was also responsible for implementation of the multiplicity trigger. The new data set should allow investigation of physics topics beyond the Standard Model, such as D-zero D-zero-bar mixing via semileptonic decays, rare and forbidden charm decays (flavor changing neutral currents, lepton number violating, and lepton family number violating decays), and CP violating charm decays. This group is also involved in R&D work on the proposed BTeV program in region C0 at Fermilab, which is intended as a third generation B physics experiment, in particular the PI has been selected to lead the muon detector effort.