Interactions on Orbifolds
In the conventional, or field theoretical, effective theory approach, we have been content with obtaining the spectrum, and constructed low energy Lagrangian guided by symmetry and naturalness. Since we have the first principle of string theory, we can in principle perform more detailed calculations. It turns out that many “stringy” effects can enhance or suppress the interaction.
KeywordsYukawa Coupling Point Function Vertex Operator Operator Product Expansion Threshold Correction
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