Rare Radiative Decays of the Phi Meson

披介子的罕见辐射衰变

• 批准号: 9603634
• 负责人: James Kolata
• 金额: $ 21.5万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9603634&HistoricalAwards=false
• 关键词: Rare; Radiative; Decays; Phi; Meson

A detector that will be constructed for an experiment at CEBAF to measure rare radiative decays of the Phi Meson. The experiment is a collaborative effort involving nuclear and high-energy physicists from several universities. It has received the highest rating from the CEBAF Program Advisory Committee. The total cost of the detector will be shared with the Department of Energy and with several of the universities involved in the project; this funding is already in place. Partial support will be provided by the NSF Office of Multidisciplinary Activities (OMA) as part of an enabling initiative for instrumentation development. The goal of the experiment is to measure rare radiative decays of the phi meson in order to study the quark structure of daughter states as well as to probe possible symmetry violations. Sensitivity to branching ratios at one part in ten thousand will permit significantly improved charge conjugation tests, as well as providing important information about the structure of poorly understood scalar meson states. The detector will consist of an electromagnetic calorimeter which will detect all-photon decay modes of the phi meson. The requested funds will be used to construct a charged-particle veto wall to ensure a neutral final state, a dedicated data acquisition system, and various ancillary devices such as a suitable target and beam pipe and calibration system for the calorimeter. Graduate education is a central but implicit element in this project.

一个探测器，将在CEBAF的一个实验，以测量罕见的Phi介子的辐射衰变。 这项实验是由几所大学的核物理学家和高能物理学家共同努力的结果。 它获得了CEBAF计划咨询委员会的最高评级。 探测器的总成本将与能源部和参与该项目的几所大学分摊;这笔资金已经到位。 部分支持将由NSF多学科活动办公室（OMA）提供，作为仪器开发启动计划的一部分。 该实验的目的是测量罕见的辐射衰变的phi介子，以研究子态的夸克结构，以及探测可能的对称性破坏。 对万分之一的分支比的灵敏度将允许显着改进的电荷共轭测试，以及提供有关不太了解的标量介子态结构的重要信息。 探测器将由一个电磁量能器组成，它将探测phi介子的全光子衰变模式。 申请的资金将用于建造一个带电粒子否决墙，以确保中性的最终状态，一个专用的数据采集系统，以及各种辅助设备，如合适的目标和束管以及量热计的校准系统。 研究生教育是这一项目的核心但隐含的要素。