CMS Experiment at CERN and HERA-B Experiment at DESY

该提案请求支持加州大学洛杉矶分校的一个小组开展以下工作：(A)目前正在为在瑞士日内瓦的CERN实验室运行而建造的CMS实验，以及(B)目前在德国汉堡的DESY实验室进行的HERA-B实验。CERN大型强子对撞机(LHC)的CMS实验将研究质心能量为14TeV的质子-质子相互作用。物理计划包括探索夸克和轻子子子子结构和新的重规范玻色子，电弱对称破缺和质量起源，顶夸克产生和衰变的性质，CP破坏和B介子衰变中的其他罕见现象，以及寻找超对称粒子和标准模型以外的其他现象。加州大学洛杉矶分校的团队将把工作重点放在“更高级别”的触发和数据采集(DAQ)领域。此外，他们将为CMS低强度B物理运行做准备，这将是早期大型强子对撞机运行的主要组成部分，并将在以后对b喷注标记更奇异的状态起到重要作用。HERA-B实验的目的是发现和研究B介子衰变中的CP破坏和其他主题。HERA-B是在HERA质子存储环上进行的正向固定目标实验，该环在存储的束晕中使用线状目标，并在真空管内使用硅微顶点探测器。主要目的是测量与电子-正电子“b工厂”相当的衰变Bd J/YKs的CP破坏参数Sin(2b)。他们预计到2000年夏天将测量到400次这样的事件。

This proposal requests support for a group at the University of California Los Angeles to work on (a) the CMS experiment currently being built for running at the CERN Laboratory in Geneva, Switzerland, and (b) the HERA-B experiment currently taking data at the DESY Laboratory in Hamburg, Germany. The CMS experiment at the CERN Large Hadron Collider (LHC) will investigate proton-proton interactions at a center-of-mass energy of 14 TeV. The physics program includes probing for quark and lepton substructure and new heavy gauge bosons, electroweak symmetry breaking and the origin of mass, properties of top-quark production and decay, CP-violation and other rare phenomena in B-meson decay and the search for supersymmetric particles and other phenomena beyond the Standard Model. The UCLA group will focus its efforts on the "higher-level" trigger and data acquisition (DAQ) areas. In addition, they will prepare for the CMS low-intensity B-physics running which will be a major component in early LHC running and will later be important for b-jet tagging of more exotic states. The objective of the HERA-B experiment is the discovery and study of CP-violation and other topics in B-meson decay. HERA-B is a "fixed-target" experiment in the forward direction at the HERA proton storage ring that uses wire targets in the halo of the stored beam and a silicon microvertex detector inside the vacuum pipe. The primary goal is measurement of the CP-violation parameter, sin(2b), for the decay Bd J/Y KS comparable to that of an electron-positron "b-factory". They expect to measure 400 such events by the summer of 2000.