Research at the Intensity Frontier with the LHCb Experiment

通过 LHCb 实验进行强度前沿研究

• 批准号: 1201974
• 负责人: Sheldon Stone
• 金额: $ 304万
• 依托单位: Syracuse University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-15 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1201974&HistoricalAwards=false
• 关键词: Research; Intensity; Frontier; LHCb; Experiment

The physics program at the Large Hadron Collider (LHC) at CERN, Geneva, Switzerland is in full operation, now delivering proton-proton collisions at 8 TeVcollision energy. The Syracuse group is a member of the LHCb experiment which is currently in an intense data-taking phase for 2012, and which will segue into an analysis and upgrade phase during the period 2013-2014. Afterward, operations will resume at 14 TeV collision energy. The LHCb experiment is designed to study beauty and charm decays at a hadron collider and the experiment and the Syracuse group are well-positioned to: (1) make direct measurements of the production and decay properties of these particles, and (2) simultaneously have sensitivity to new physics at high mass scales through the attendant effects of such physics on decay rates, CP violating asymmetries, or polarizations of certain vector states in the beauty and charm particle decays. Syracuse contributes significantly to the physics program including: measurement of the b-bbar production cross section, determination of b-hadron branching fractions, discovery of a new semileptonic decays of strange neutral B mesons, including first observation of CP Violation in the decay of the strange neutral B meson into a J/psi and f meson. The group is aggressively pursuing these analyses and measuring the CP violating angle gamma and lifetimes of strange neutral B mesons.In technical and service responsibility to LHCb, Syracuse participation has been very broad, with contributions to the Vertex Locator, Trigger, and Ring Imaging Cherenkov detector testing, and ongoing LHCb operations. The group is active in detector research and development with emphasis on new technologies for the upgraded vertex detector and responsibility for silicon based downstream tracking. The Syracuse group is active in the research and development of highly radiation resistant semiconductor detectors, capable of surviving the vigorous conditions expected at the High Luminosity LHC, and in the development of diamond tracking detectors. Throughout its research program, Syracuse has maintained an active interest in broadening participation. The group has recently joined QuarkNet and maintains an "Ask a Particle Physicist" website, so that teachers and other members of the community can interact informally with the group. And the group actively encourages and supports younger members of the research team to be actively engaged in the high school classroom.

位于瑞士日内瓦欧洲核子研究中心的大型强子对撞机（LHC）的物理程序正在全面运作，目前正在提供8 TeV碰撞能量的质子-质子碰撞。 锡拉丘兹小组是LHCb实验的成员，该实验目前正处于2012年的密集数据采集阶段，并将在2013-2014年期间进入分析和升级阶段。之后，操作将在14 TeV的碰撞能量下恢复。 LHCb实验旨在研究强子对撞机上的美丽和魅力衰变，该实验和锡拉丘兹小组处于有利地位，可以：（1）直接测量这些粒子的产生和衰变性质，以及（2）同时通过这种物理对衰变率的伴随效应对高质量尺度的新物理具有灵敏度，CP违反不对称性，或者说，在美和魅粒子衰变中，某些矢量态的偏振。 锡拉丘兹对物理计划的贡献包括：测量了b-bbar产生截面，确定了b-强子分支分数，发现了一种新的奇异中性B介子的半轻子衰变，包括首次观察到奇异中性B介子衰变为J/psi和f介子的CP破坏。 该小组正在积极地进行这些分析和测量CP违反角γ和奇怪的中性B介子的寿命。在技术和服务责任LHC B，锡拉丘兹参与了非常广泛的，与贡献的顶点探测器，触发器和环成像切伦科夫探测器测试，并正在进行的LHC B操作。 该小组积极参与探测器的研究和开发，重点是升级顶点探测器的新技术，并负责基于硅的下游跟踪。 锡拉丘兹小组积极研究和开发高抗辐射半导体探测器，能够在高亮度LHC预期的剧烈条件下生存，并开发金刚石跟踪探测器。在整个研究计划中，锡拉丘兹一直对扩大参与保持着积极的兴趣。该小组最近加入了QuarkNet，并维护了一个“询问粒子物理学家”网站，以便教师和社区的其他成员可以与该小组进行非正式的互动。 该小组积极鼓励和支持研究小组的年轻成员积极参与高中课堂。