English

Yukawa Textures with Enhanced Symmetries in Heterotic Calabi-Yau Compactifications

High Energy Physics - Theory 2026-03-03 v1 High Energy Physics - Phenomenology

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 U(2)U(2) 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