Study on phenomenological aspects in superstring theory

我们研究了由超弦理论发展而来的四维低能有效场论，特别是关于旋涡模型和磁化/相交薄膜模型的杂化弦理论。我们研究了这些弦模型中出现的阿贝尔和非阿贝尔离散对称性。我们还研究了它们的反常现象，发现了某些反常现象之间的普遍关系。此外，通过显式的弦计算，我们显示了严格的耦合选择规则，这似乎很难从低能有效场论的对称性中理解。

We have studied four-dimensional low-energy effective field theory, derived from superstring theory, in particular heterotic string theory on the orbifolds and magnetized/intersecting brane models. We have studied Abelian and non-Abelian discrete symmetries, which appear in these string models. Also we have studied their anomalies and found that the universal relations among certain anomalies. Furthermore, by explicit string computations we have shown stringy coupling selection rules, which seem to be difficult to understand from the symmetries of low-energy effective field theories.