Studies of the Proton Structure with Electron Beams

用电子束研究质子结构

• 批准号: 2310067
• 负责人: Fatiha Benmokhtar
• 金额: $ 23万
• 依托单位: Duquesne University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-08-01 至 2026-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2310067&HistoricalAwards=false
• 关键词: Studies; Proton; Structure; Electron; Beams

Half a century of experimental investigations into the proton's internal structure have provided remarkable insight into the dynamics of the quarks and gluons making up the particle. However, many outstanding questions remain. Even the most fundamental aspect, the origin of the mass of nuclei, is uncertain. To date, the most visible mass of the universe, as well as a complete description of how quarks are confined into composite particles remain outside our current understanding. The PI and her Duquesne undergraduate students will investigate the origin of the spin of the proton through its fundamental constituents, using electron beams at the Thomas Jefferson National Accelerator Facility. This award supports the PI and Duquesne undergraduate students in research aiming to study the structure of the proton through its partonic distributions using polarized electron scattering in the deep inelastic scattering regime in Hall B at Jefferson lab. These measurements will help understand the origin of single hadron formation inside the proton. Combined with additional measurements on deuterium targets, the PI will be able to probe the strangeness contribution to the structure of the nucleon through its partonic distribution using charged kaon and pion detection. The Duquesne group will participate in monitoring and maintaining the software for two hybrid Ring Imaging Cherenkov Detectors that are important for particle identification. Software development and Physics data analysis will be performed at Duquesne, while electronics testing and other hardware projects will be performed at Jefferson lab. This project will provide undergraduate students with opportunities to further their training and education outside of the classroom. This includes gaining experience in the design, assembly, and testing of modern particle Physics detectors, high tech fast electronics, and scientific data analysis.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

半个世纪的实验研究对质子的内部结构进行了极大的了解，对构成粒子的夸克和振动的动力学有了极大的了解。但是，仍然存在许多出色的问题。即使是最基本的方面，核的质量的起源也不确定。 迄今为止，宇宙中最明显的质量，以及如何将夸克限制在复合粒子中的完整描述仍然不在我们当前的理解之外。 PI和她的Duquesne本科生将使用Thomas Jefferson National Accelerator设施中的电子束来研究质子的基本成分旋转的起源。 该奖项支持PI和Duquesne本科生的研究，旨在通过质子分布在Jefferson Lab的H Hall B中使用极化电子散射来研究质子的结构。这些测量将有助于了解质子内部单一强子形成的起源。结合对氘靶标的其他测量结果，PI将能够使用带电的KAON和PION检测来探测核子通过其党派分布的陌生贡献。 Duquesne组将参与对两个对于粒子识别很重要的混合环成像Cherenkov检测器的监视和维护软件。软件开发和物理数据分析将在Duquesne进行，而电子测试和其他硬件项目将在Jefferson Lab进行。该项目将为本科生提供机会，以进一步在课堂外培训和教育。这包括在设计，组装和测试现代粒子物理探测器，高科技快速电子设备以及科学数据分析方面获得经验。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛的影响来通过评估来支持的。