Coupling Selection Rules in Heterotic Calabi-Yau Compactifications
arXiv:2504.09773 · doi:10.1007/JHEP09(2025)012
Abstract
We study coupling selection rules of chiral matter fields in heterotic string theory with standard embedding. These selection rules are determined by topological properties of Calabi-Yau threefolds. We classify coupling selection rules on complete intersection Calabi-Yau threefolds for . It is found that all of these selection rules for are understood by combinations of only five types of fusion rules.
v2: 31 pages, published version
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