Meson Physics at Arizona State University

亚利桑那州立大学介子物理学

• 批准号: 1306737
• 负责人: Barry Ritchie
• 金额: $ 48万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1306737&HistoricalAwards=false
• 关键词: Meson; Physics; Arizona; State; University; Meson; Physics; Arizona; State; University

Technical description:This award supports a program of research in experimental hadronic physics by the Arizona State University Meson Physics Group which will yield information crucial to achieving a better understanding of how hadrons are composed of quarks by providing a large data set detailing the excitation spectra of key two- and three-quark systems. In particular, the Meson Physics Group at Arizona State University will study the excitations of the nucleon, Cascade, and Omega baryons, as well as the excitations of gluonic flux tubes within mesons. The polarization data that the group will provide for the nucleon are essential for addressing one of the NSAC/OMB milestones for hadronic physics, and the ASU group is uniquely positioned to provide that data. The group is also participating in a conditionally approved experiment that will use the CLAS12 detector under construction at Jefferson Lab to produce and discover excited baryon states of the Cascade and Omega using quasi-real incident photons. The data to be obtained will further detail the excitations of three-quark systems and complements work being done by the group on excited nucleons. The Meson Physics Group at Arizona State University also will work with the GlueX detector, currently under construction in Hall D at Jefferson Lab, in order to search gluonic excitations within mesons of masses up to 2.5 GeV. The ASU group will assume primary responsibility for building a triplet polarimeter to directly measure the Hall D photon beam polarization. The results of these investigations will be broadly disseminated through conference presentations and refereed publications, and will be archived in public databases.Broader significance and importance:No comprehensive theoretical description of how the nucleus of the atom is built from quarks can be achieved without a solid knowledge of the excited states. The data obtained from Arizona State University Meson Physics Group will further inform and test theoretical models used to understand the structure of matter that is comprised of quarks. In addition to potential discoveries in, and advancement of, the understanding of nuclear physics, the work to be supported will provide instruction and mentoring in science and technology to undergraduate and graduate students, as well as to a postdoctoral research associate. The triplet polarimeter to be built will enhance the precision reached for experiments conducted in Hall D at JLab as well as those using the photon beam at Mainz, resulting in important improvements in the infrastructure of those laboratories.

技术描述：该奖项支持亚利桑那州立大学Meson Physics Group的实验性HADRONIC物理学研究计划，该计划将通过提供一个大型数据集，详细介绍一个大数据集，详细介绍关键的两夸克系统的激发光谱，从而产生对如何更好地了解Hadron的信息至关重要。特别是，亚利桑那州立大学的梅森物理小组将研究细胞核，级联和欧米茄重子的激发，以及介子内gluonic通量管的激发。该组将为核子提供的极化数据对于解决HADRONIC Physics的NSAC/OMB里程碑之一至关重要，并且ASU组具有独特的位置以提供该数据。该小组还参加了一个有条件批准的实验，该实验将使用杰斐逊实验室正在建设的CLAS12检测器使用准现实的入射光子生产并发现级联和欧米茄的激发baryon状态。要获得的数据将进一步详细介绍三夸克系统的激发，并由小组对激发核子进行的补充工作。亚利桑那州立大学的梅森物理小组还将与目前在Jefferson Lab D Hall建造的Gluex探测器合作，以搜索最高2.5 GEV的大众中的Gluonic激发。 ASU组将承担构建三胞胎偏振仪的主要责任，以直接测量霍尔D光子束极化。这些调查的结果将通过会议演讲和卷发出版物进行广泛传播，并将在公共数据库中存档。BROADER的意义和重要性：对于如何从夸克中构建原子的原子的核心，没有牢固的知识就可以实现原子的原子核的全面理论描述。从亚利桑那州立大学Meson Physics Group获得的数据将进一步告知和测试用于了解由夸克组成的物质结构的理论模型。除了对核物理学的理解和进步的潜在发现外，要支持的工作还将为科学和技术提供指导和指导，以向本科生和研究生以及博士后研究员提供。要构建的三胞胎偏振计将提高在JLAB厅D进行的实验以及在Mainz上使用光子束的实验所达到的精度，从而导致这些实验室基础设施的重要改善。