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arXiv · 2504.09773

Coupling Selection Rules in Heterotic Calabi-Yau Compactifications

Jun Dong·Tatsuo Kobayashi·Ryusei Nishida·Satsuki Nishimura·Hajime Otsuka
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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 $h^{1,1}\leq 5$. It is found that all of these selection rules for $h^{1,1}\leq 5$ are understood by combinations of only five types of fusion rules.

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Jun Dong, Tatsuo Kobayashi, Ryusei Nishida, Satsuki Nishimura, Hajime Otsuka. 2025-04-14. Coupling Selection Rules in Heterotic Calabi-Yau Compactifications. https://doi.org/10.1007/jhep09(2025)012

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