Yukawa Textures with Enhanced Symmetries in Heterotic Calabi-Yau Compactifications
Abstract
We clarify the structure of Yukawa couplings and mass matrices for matter fields in heterotic string theory on smooth Calabi-Yau threefolds with standard embedding. The topological structure of Calabi-Yau threefolds leads to interesting Yukawa textures that cannot be derived from group-theoretical symmetries, e.g., the so-called Weinberg texture in the case of two generations of matter fields. Furthermore, we find that a flavor symmetry, which plays an important role in controlling higher-dimensional operators in the Standard Model effective field theory, emerges at specific loci in the moduli space of multi-Higgs fields. Small perturbations around these loci generate semi-realistic patterns of quark masses and mixings.
Keywords
Cite
@article{arxiv.2603.00864,
title = {Yukawa Textures with Enhanced Symmetries in Heterotic Calabi-Yau Compactifications},
author = {Jun Dong and Tatsuo Kobayashi and Shuhei Miyamoto and Hajime Otsuka},
journal= {arXiv preprint arXiv:2603.00864},
year = {2026}
}
Comments
44 pages, 19 figures