Theoretical Studies of Hadronic and Nuclear Dynamics

研究的主要目的是研究核强子动力学，特别强调它与量子色动力学（QCD）的关系，量子色动力学是夸克和胶子的基本动力学。我们对手性对称的作用特别感兴趣，手性对称是QCD的基本对称之一。手性微扰理论提供了一个系统和实用的框架，将量子cd的对称性转化为强子的对称性，而强子实际上是构成原子核的粒子。我们的研究广泛地运用了这种形式主义。同时，对于那些超出手性微扰理论适用范围的现象，我们求助于保持手性对称的模型，这些模型可以应用于复杂的原子核。具体来说，我们研究了：(1)核手性微扰理论应用于少核子系统的结果；(2)轻核上的μ子捕获及其与轻核中微子相互作用的关系；(3)中微子-氘核截面的辐射修正，这将对萨德伯里中微子天文台获得下一代高精度太阳中微子数据具有重要意义；(4) sigma模型与手性微扰理论的比较；(5)致密物质中的奇异凝聚。

0140214MyhrerThe main aim of the research is to investigate nuclear-hadronicdynamics with a particular emphasis on its relation to quantumchromodynamics (QCD), the fundamental dynamics of quarks and gluons. Weare particularly interested in the role of chiral symmetry, which is oneof the basic symmetries of QCD. Chiral perturbation theory offers a systematic and practical frameworkto translate the symmetries of QCD into those of hadrons, particles thatactually constitute nuclei. Our research makes extensive useof this formalism. At the same time, for those phenomena which are atpresent beyond the applicability of chiral perturbation theory, weresort to models that preserve chiral symmetry and that can be appliedto complex nuclei. Specifically, we study: (1) Consequences of nuclear chiral perturbation theory as applied tofew-nucleon systems; (2) Muon capture on light nuclei and its relation to neutrinointeractions with light nuclei; (3) Radiative corrections for the neutrino-deuteron cross sections,corrections that will be of importance for next-generation highprecision solar neutrino data to be obtained at the Sudbury NeutrinoObservatory; (4) Comparison of the sigma model and chiral perturbation theory; and (5) Strangeness condensation in dense matter.