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arXiv 1408.6448hep-th
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Yukawas和无截面F理论紧化中的离散对称性

Yukawas and discrete symmetries in F-theory compactifications without section

Iñaki García-Etxebarria, Thomas W. Grimm, Jan Keitel

摘要:

在没有截面的亏格1纤维化上的F-理论紧化的情况下,自然会出现离散对称性,我们认为这与几何质量U(1)规范对称性有关。这些离散的对称性诱导出SU(N)规范理论中允许的Yukawa耦合的非平凡选择定则。一般的讨论是用一个具体的卡-丘四重实现SU(5)大统一模型。我们观察到,M2瞬子效应似乎在新的超势项的产生和接近相变轨迹的动力学中起着关键作用。

英文摘要:

In the case of F-theory compactifications on genus-one fibrations without section there are naturally appearing discrete symmetries, which we argue to be associated to geometrically massive U(1) gauge symmetries. These discrete symmetries are shown to induce non-trivial selection rules for the allowed Yukawa couplings in SU(N) gauge theories. The general discussion is exemplified using a concrete Calabi-Yau fourfold realizing an SU(5) GUT model. We observe that M2 instanton effects appear to play a key role in the generation of new superpotential terms and in the dynamics close to phase transition loci.

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