Meson Physics at Arizona State University

亚利桑那州立大学介子物理学

• 批准号: 0354820
• 负责人: Barry Ritchie
• 金额: --
• 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: 2004
• 资助国家: 美国
• 起止时间: 2004-08-15 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0354820&HistoricalAwards=false
• 关键词: Meson; Physics; Arizona; State; University

During the award period, the Arizona State University Meson PhysicsGroup will continue to study the internal quark structure of theneutrons and protons (nucleons) that make up atomic nuclei. The groupwill use high energy photons to excite these neutrons and protons, andthen study the ways these excited nucleons decay. In particular, we willlook for the emission of eta and eta-mesons during the decay process. Byobserving various decay modes, we will provide important data that willtest and refine theories of how the neutrons and protons are built upfrom quarks.The high energy photons will be provided by the Bremsstrahlung PhotonTagging Facility in Experimental Hall B at the Thomas Jefferson NationalAccelerator Facility in Newport News, Virginia. The decay products willbe studied using the CEBAF Large Acceptance Spectrometer (CLAS) in HallB. Members of the ASU Meson Physics Group form part of the CLASCollaboration and, during the award period, we will provide service workassociated with maintaining this experimental equipment, as well assupport data-taking for CLAS experiments as required.

颁奖期间，亚利桑那州立大学介子物理组将继续研究构成原子核的中子和质子（核子）的内部夸克结构。该小组将使用高能光子来激发这些中子和质子，然后研究这些激发的核子衰变的方式。特别是，我们将寻找衰变过程中 eta 和 eta 介子的发射。通过观察各种衰变模式，我们将提供重要的数据，用于测试和完善中子和质子如何由夸克形成的理论。高能光子将由纽波特托马斯·杰斐逊国家加速器设施实验厅 B 的轫致辐射光子标记设施提供新闻，弗吉尼亚。衰变产物将使用 HallB 的 CEBAF 大接收光谱仪 (CLAS) 进行研究。亚利桑那州立大学介子物理组的成员是 CLAAS 合作的一部分，在奖励期间，我们将提供与维护该实验设备相关的服务工作，并根据需要支持 CLAS 实验的数据采集。