Studies of Light Meson Structure and Validation of the Exclusive Reaction Mechanism

轻介子结构研究及专属反应机理验证

• 批准号: 2012430
• 负责人: Tanja Horn
• 金额: $ 48万
• 依托单位: Catholic University of America
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012430&HistoricalAwards=false
• 关键词: Studies; Light; Meson; Structure; Validation

Understanding the nature of matter in terms of its basic building blocks, how these interact and form the elements and properties we observe, is one of the mysteries of the universe. Nuclear physics research is fundamental to our understanding of all forms of matter and how this knowledge can benefit society in the areas of national health, prosperity and welfare, and national security. This research program at The Catholic University of America is focused on studying and comparing the underlying quark-gluon structure of the basic building blocks of the atomic nucleus: its protons, neutrons, pions and kaons. This research contributes significantly to educating the future advanced STEM workforce through training of graduate, undergraduate, and high school students in state-of-the art instrumentation and machine-learning-informed software development. This research program aims at deepening the understanding of the lightest subatomic particles, the pions and kaons - their form factors, their structure functions, and their masses, and at providing measurements to validate the framework for 3D hadron imaging. The program focuses in the near and intermediate term on Jefferson Lab 12 GeV, and in the long term on the US-based Electron-Ion Collider (EIC). The experimental method uses beams of highly energetic electrons and/or photons to probe the deep inside of a hadron through exclusive and semi-inclusive scattering processes. Young scientists and students at all levels play an integral part in this project, which provides opportunities to gain experience in the design, assembly, and testing of modern subatomic particle detectors, fast signal processing electronics, and scientific data analysisThis 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.

从物质的基本组成部分来理解物质的本质，这些基本组成部分如何相互作用并形成我们观察到的元素和性质，是宇宙的奥秘之一。核物理研究对于我们了解所有形式的物质以及这些知识如何在国家健康、繁荣和福利以及国家安全领域造福社会至关重要。美国天主教大学的这项研究计划侧重于研究和比较原子核基本组成部分的潜在夸克-胶子结构：质子，中子，π介子和K介子。这项研究通过对研究生、本科生和高中生进行最先进的仪器和机器学习软件开发培训，为教育未来的高级STEM劳动力做出了重大贡献。该研究计划旨在加深对最轻的亚原子粒子，π介子和K介子的理解-它们的形状因子，结构函数和质量，并提供测量以验证3D强子成像的框架。该计划的近期和中期重点是杰斐逊实验室的12 GeV，长期重点是美国的电子离子对撞机（EIC）。实验方法使用高能电子和/或光子束通过排他性和半包容性散射过程探测强子的内部深处。各级青年科学家和学生在这个项目中发挥着不可或缺的作用，该项目提供了在现代亚原子粒子探测器、快速信号处理电子器件和科学数据分析的设计、组装和测试方面获得经验的机会。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估来支持。

项目成果

Deep Exclusive Electroproduction of π0 at High Q2 in the Quark Valence Regime

在夸克价态中高 Q2 深度独家电生产 Ï0

• DOI: 10.1103/physrevlett.127.152301
• 发表时间: 2021
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: Dlamini, M.;Karki, B.;Ali, S. F.;Lin, P-J.;Georges, F.;Ko, H-S;Israel, N.;Rashad, M. N. H.;Stefanko, A.;Adikaram, D.
• 通讯作者: Adikaram, D.

Insights into the emergence of mass from studies of pion and kaon structure

• DOI: 10.1016/j.ppnp.2021.103883
• 发表时间: 2021-02
• 期刊: Progress in Particle and Nuclear Physics
• 影响因子: 9.6
• 作者: C. Roberts;D. Richards;T. Horn;Lei Chang

ECCE unpolarized TMD measurements

ECCE 非偏振 TMD 测量

• DOI: 10.1016/j.nima.2023.168458
• 发表时间: 2023
• 期刊: Detectors and Associated Equipment
• 作者: Seidl, R.;Vladimirov, A.;Adkins, J.K.;Akiba, Y.;Albataineh, A.;Amaryan, M.;Arsene, I.C.;Gayoso, C. Ayerbe;Bae, J.;Bai, X.
• 通讯作者: Bai, X.

Probing the Deuteron at Very Large Internal Momenta

探测氘核的巨大内动量

• DOI: 10.1103/physrevlett.125.262501
• 发表时间: 2020
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: Yero, C.;Abrams, D.;Ahmed, Z.;Ahmidouch, A.;Aljawrneh, B.;Alsalmi, S.;Ambrose, R.;Armstrong, W.;Asaturyan, A.;Assumin-Gyimah, K.
• 通讯作者: Assumin-Gyimah, K.

Measured proton electromagnetic structure deviates from theoretical predictions

测量的质子电磁结构偏离理论预测

• DOI: 10.1038/s41586-022-05248-1
• 发表时间: 2022
• 期刊: Nature
• 影响因子: 64.8
• 作者: Li, R.;Sparveris, N.;Atac, H.;Jones, M. K.;Paolone, M.;Akbar, Z.;Gayoso, C. Ayerbe;Berdnikov, V.;Biswas, D.;Boer, M.
• 通讯作者: Boer, M.