Theoretical Studies of the Quark Structure of Nucleons and Nuclei

核子和原子核夸克结构的理论研究

• 批准号: 0071658
• 负责人: Charles Benesh
• 金额: $ 4万
• 依托单位: Wesleyan College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-15 至 2002-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0071658&HistoricalAwards=false
• 关键词: Theoretical; Studies; Quark; Structure; Nucleons

0071658BeneshDetermination of the distributions of quarks and gluons inside ofthe proton and there hadronic particles is one f the central topics in high energy nuclear and particle physics. The form of these distributions impacts not only our understanding of the structure of the proton, but lso affects the interpretation of experiments at higher energies which require these distributions as input. The primary focus of this proposal is the calculation of the harge asymmetric contribution to the proton sea within a variety of distinct models of the nucleon sea. A secondary focus of this proposal is the study of nuclear effects on quark distributions using phenomenological descriptions of light nuclei. Such nuclei are sufficiently tightly bound to exhibit significant nuclear modifications to their quark distributions and yet are simple enough to be modeled phenomenologically. We propose to apply models and methods that have previously been used to calculate the quark distributions of single nucleons to light nuclei in order to test the viability of these models as alternative explanations of the observed modification of quark distributions in nuclei.

[00:71658]质子和强子粒子内部夸克和胶子分布的测定是高能核物理和粒子物理的中心课题之一。这些分布的形式不仅影响我们对质子结构的理解，而且还影响需要这些分布作为输入的高能量实验的解释。本建议的主要重点是计算各种不同的核子海模型中电荷对质子海的不对称贡献。本建议的第二个重点是利用轻核的现象学描述研究夸克分布的核效应。这样的原子核结合得足够紧密，足以对其夸克分布表现出显著的核修饰，但又足够简单，可以在现象学上建模。我们建议将以前用于计算单核子夸克分布的模型和方法应用于轻核，以测试这些模型作为观察到的原子核中夸克分布变化的替代解释的可行性。