Research at the Intensity Frontier with the LHCb Experiment

位于瑞士日内瓦的欧洲核子研究中心（CERN）的大型强子对撞机（LHC）的物理项目正在全面运行，目前正在以8 tev的碰撞能量进行质子-质子碰撞。锡拉丘兹大学的研究小组是LHCb实验的成员之一，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，将以14tev的碰撞能量恢复运行。LHCb实验旨在研究强子对撞机上的美丽和魅力衰变，实验和Syracuse小组处于有利地位：(1)直接测量这些粒子的产生和衰变特性，(2)同时通过这些物理对美丽和魅力粒子衰变中衰变速率、CP违反不对称或某些矢量态极化的伴随效应，对高质量尺度上的新物理具有敏感性。锡拉丘兹对物理项目做出了重大贡献，包括：测量B - bar产生截面，确定B -强子分支分数，发现奇异中性B介子的新半光子衰变，包括首次观察到奇异中性B介子衰变为J/psi和f介子时的CP违和。该小组正在积极地进行这些分析，并测量CP违背角伽玛和奇怪的中性B介子的寿命。在LHCb的技术和服务责任方面，锡拉丘兹大学的参与非常广泛，为顶点定位器、触发器和环成像切伦科夫探测器测试以及正在进行的LHCb操作做出了贡献。该集团积极从事探测器的研究和开发，重点是升级顶点探测器的新技术，并负责硅基下游跟踪。锡拉丘兹小组积极从事高抗辐射半导体探测器的研究和开发，能够在高亮度大型强子对撞机的苛刻条件下生存，并开发钻石跟踪探测器。在整个研究项目中，雪城大学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“问粒子物理学家”网站，这样教师和社区的其他成员就可以与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。

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.