Elementary Particle Physics Using High Energy Colliders

使用高能对撞机的基本粒子物理

• 批准号: 1206111
• 负责人: Henry Lubatti
• 金额: $ 247.6万
• 依托单位: University of Washington
• 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: 2012-06-01 至 2015-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1206111&HistoricalAwards=false
• 关键词: Elementary; Particle; Physics; Using; Energy

The Large Hadron Collider (LHC) at CERN has produced 5 inverse femtobarns of collision data to date and the data set is expected to increase to 15 inverse femtobarns by the end of 2012. The University of Washington Experimental Particle Physics group, a member of the ATLAS collaboration, is continuing an ambitious program to take full advantage of the unprecedented discovery potential of the LHC. The research is focused mainly on the search for the mechanism of Electroweak Symmetry Breaking (EWSB). In the Standard Model (SM) as well as in Supersymmetric (SUSY) extensions of the SM, the Higgs mechanism is the most compelling explanation of EWSB. The Washington research program addresses this open question from two directions: searches for a low-mass SM Higgs and for the neutral SUSY Higgs bosons using decays into tau leptons; and searches for non-standard light Higgs decays to neutral particles that can be long-lived. In addition to the ATLAS physics program, the group continues to expand its contributions to the ATLAS detector and software. The group designed, built and commissioned a large part of the ATLAS forward muon chambers and has significant responsibilities in the operations and online and offline data quality assurance of the muon system. Group members are active participants in the fabrication of the IBL (Insertable Barrel Layer) for the ATLAS pixel detector and will participate in the IBL installation in 2013-14. The group also continues to be strongly involved in the development of b-quark tagging and muon triggering algorithms and the reconstruction and identification of tau-leptons. The program at the University of Washington provides a significant opportunity for undergraduate training, an important feature given that UW has one of the largest physics undergraduate programs in the country. The group plans to continue its long tradition of involving undergraduates in all aspects of the research work. Washington is also actively engaged in outreach efforts to local high school teachers and students as part of the national QuarkNet program. Notably, the Washington group has recently opened a new direction in its QuarkNet participation by involving teachers and students in the analysis of ATLAS data. Their commitment to broader education and outreach is also demonstrated by the fact that one of the group's faculty members has recently become a co-principal investigator of QuarkNet at the national level.

迄今为止，欧洲核子研究中心的大型强子对撞机（LHC）已经产生了5个反飞巴的碰撞数据，预计到2012年底，数据集将增加到15个反飞巴。华盛顿大学实验粒子物理小组是ATLAS合作项目的成员之一，正在继续一项雄心勃勃的计划，以充分利用大型强子对撞机前所未有的发现潜力。研究的重点是寻找电弱对称破缺（EWSB）的机制。在标准模型（SM）以及标准模型的超对称扩展（SUSY）中，希格斯机制是对ewwsb最令人信服的解释。华盛顿的研究计划从两个方向解决了这个悬而未决的问题：寻找低质量的SM希格斯玻色子和使用衰变成tau轻子的中性SUSY希格斯玻色子；并寻找非标准的轻希格斯粒子，这些粒子会衰变为寿命较长的中性粒子。除了ATLAS物理项目外，该小组还在继续扩大其对ATLAS探测器和软件的贡献。该小组设计、建造和调试了ATLAS向前μ子室的大部分，并在μ子系统的运行和在线和离线数据质量保证方面负有重要责任。小组成员积极参与了ATLAS像素探测器IBL（可插入桶层）的制造，并将参与2013-14年IBL的安装。该小组还继续积极参与b-夸克标记和μ子触发算法的开发以及tau轻子的重建和识别。华盛顿大学的这个项目为本科生培训提供了一个重要的机会，这是华盛顿大学拥有全国最大的物理学本科项目之一的一个重要特点。该小组计划继续其悠久的传统，让本科生参与研究工作的各个方面。作为国家夸克网络计划的一部分，华盛顿还积极参与向当地高中教师和学生提供服务的工作。值得注意的是，华盛顿小组最近在QuarkNet参与方面开辟了一个新方向，让教师和学生参与ATLAS数据的分析。他们对更广泛的教育和推广的承诺也体现在一个事实上，即该小组的一名教员最近成为了QuarkNet在国家层面的联合首席研究员。