Theoretical Nuclear Physics

理论核物理

• 批准号: 9319641
• 负责人: Leonard Kisslinger
• 金额: $ 38.2万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9319641&HistoricalAwards=false
• 关键词: Theoretical; Nuclear; Physics

9319641 Kisslinger Research in theoretical medium energy nuclear physics in the following areas: (1) studies of perturbative and nonperturbative QCD for the quark/gluon structure of hadrons and nuclei by QCD sum rule methods and by light-cone Bethe-Salpeter models; and (2) the development of relativistic Hamiltonian dynamics for nuclear physics and for quark models of hadrons. In (1), the method of QCD sum rules will be used for the determination of hadronic properties. For the nucleon, studies will include the axial coupling constant, the neutron-proton mass difference and the parity-violating nuclear interaction. Weak hyperon decays will be calculated. For heavy-light mesons vector-pseudoscalar mass differences and leptonic decay constants are being determined including both perturbative and nonperturbative QCD. Extensions of the QCD sum rule method will be studied using nonlocal condensates for quark distributions. The transition from nonperturbative to perturbative QCD will be studied in light-cone Bethe-Salpeter models of pion and nucleon elastic form factors. Studies of quark cluster structure of nuclei, and properties of hadrons in nuclear matter will also be carried out. In (2), a major study of nucleon Compton scattering, recently completed, will be extended to other areas. Extensive calculations of nucleon electroexcitation using light-front particle dynamics will proceed. Earlier treatments of deuteron electromagnetic processes will be extended to different kinematic regimes, including quasi-elastic electrodisintegration and photodisintegration. A new study of nucleon Compton scattering will proceed. ***

小行星9319641 在以下领域进行理论中能核物理研究：（1）利用QCD求和规则方法和光锥Bethe-Salpeter模型研究强子和原子核的夸克/胶子结构的微扰和非微扰QCD;（2）发展核物理和强子夸克模型的相对论性哈密顿动力学。 在（1）中，QCD求和规则的方法将用于确定强子性质。 对于核子，研究将包括轴向耦合常数，中子-质子质量差和宇称破坏核相互作用。 弱超子衰变将被计算。 对于重轻介子，矢量赝标质量差和轻子衰变常数正在确定，包括微扰和非微扰QCD。 将使用夸克分布的非定域凝聚来研究QCD求和规则方法的扩展。 在π介子和核子弹性形状因子的光锥Bethe-Salpeter模型中研究从非微扰到微扰QCD的转变。 还将开展核的夸克团结构和核物质中强子性质的研究。 在（2）中，最近完成的核子康普顿散射的主要研究将扩展到其他领域。 将利用光阵面粒子动力学对核子电激发进行广泛的计算。 氘电磁过程的早期处理将扩展到不同的运动机制，包括准弹性电蜕变和光蜕变。 核子康普顿散射的新研究将继续进行。 ***