期刊
NUCLEAR PHYSICS B
卷 768, 期 1-2, 页码 135-156出版社
ELSEVIER
DOI: 10.1016/j.nuclphysb.2007.01.018
关键词
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We study the origin of non-Abelian discrete flavor symmetries in superstring theory. We classify all possible non-Abelian discrete flavor symmetries which can appear in heterotic orbifold models. These symmetries include D-4 and Delta(54). We find that the symmetries of the couplings are always larger than the symmetries of the compact space. This is because they are a consequence of the geometry of the orbifold combined with the space group selection rules of the string. We also study possible breaking patterns. Our analysis yields a simple geometric understanding of the realization of non-Abelian flavor symmetries. (c) 2007 Elsevier B.V. All rights reserved.
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