Topics in Theoretical Physics

拟议的研究将集中于对四个非常热门和当前感兴趣的主题的调查。第一个问题是，在具有家族规范群的大统一模型中，家族对称性是如何被打破的。人们对族对称性重新产生了兴趣，因为它们自然而然地出现在弦理论中的奥比福德紧化中。我们将研究这些模型中味道变化电流的可能实验特征。第二个项目包括在超维度模型中确定可能的Kaluza-Klein态，这些模型是轻子对撞机可能观测到的。研究的第三个主题将是是否可以在原子核中观察到u-tau转换。最后，我们将根据可能的原子物理实验来研究弦理论中可能存在的CPT和Lorentz破坏的含义。

The proposed research will focus on the investigation of four topics of very topical and current interest. The first concerns how family symmetry gets broken in grand unified models with family gauge groups. This renewed interest in family symmetries has arisen because they arise naturally in orbifold compactifications in string theory. Possible experimental signatures of flavor changing currents in these models will be investigated. The second project consists of identifying possible Kaluza-Klein states in extra-dimensional models that are candidates for being observed at lepton colliders. The third topic of research will be whether mu-tau conversion can be observed in nuclei. Finally the implication of both CPT and Lorentz violation that are possible in string theory will be investigated in terms of possible atomic physics experiments.