Theoretical Nuclear Physics

9319641 Kisslinger在以下方面的理论中能核物理研究：(1)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哈密顿动力学。在(1)中，我们将用QCD求和规则的方法来确定强子性质。对于核子，研究将包括轴向耦合常数、中子-质子质量差和破坏宇称的核相互作用。我们将计算弱超子衰变。对于重轻介子，矢量-赝标质量差和轻子衰变常数被确定，包括微扰和非微扰QCD。我们将使用夸克分布的非局域凝聚体来研究QCD求和规则方法的扩展。我们将在光锥Bethe-Salpeter模型中研究从非微扰QCD到微扰QCD的跃迁。还将研究原子核的夸克团簇结构和核物质中强子的性质。在(2)中，最近完成的一项关于核子康普顿散射的主要研究将扩展到其他领域。使用光波前粒子动力学的核子电激发的广泛计算将继续进行。早期对氚电磁过程的处理将扩展到不同的运动学状态，包括准弹性电解体和光解体。一项关于核子康普顿散射的新研究将继续进行。***

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. ***