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arXiv 0908.1784hep-th
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全局F理论GUTs

Global F-theory GUTs

Ralph Blumenhagen, Thomas W. Grimm, Benjamin Jurke, Timo Weigand

摘要:

我们构建全球F-理论大统一模型del Pezzo表面紧凑的卡-丘四倍实现两个超曲面约束的完全交叉。GUT膜和味膜的交叉点以及规范通量由谱覆盖构造来描述。我们考虑分裂S[U(4)x U(1)X]谱覆盖,它允许唯象相关的Yukawa耦合和GUT通过超荷通量断裂到MSSM,同时防止4维质子衰变。给出了无质量谱的一般表达式、一致性条件和计算曲率诱导蝌蚪的新方法。我们还提供了一个几何工具包,用于在复曲面几何的框架内进行进一步的模型搜索。最后,在Fano三重P^4的del Pezzo跃迁上纤维化的Calabi-Yau四重上定义了一个具有三个手征生成和所有必需的Yukawa耦合的显式全局模型[4]。

英文摘要:

We construct global F-theory GUT models on del Pezzo surfaces in compact Calabi-Yau fourfolds realized as complete intersections of two hypersurface constraints. The intersections of the GUT brane and the flavour branes as well as the gauge flux are described by the spectral cover construction. We consider a split S[U(4) x U(1)_X] spectral cover, which allows for the phenomenologically relevant Yukawa couplings and GUT breaking to the MSSM via hypercharge flux while preventing dimension-4 proton decay. General expressions for the massless spectrum, consistency conditions and a new method for the computation of curvature-induced tadpoles are presented. We also provide a geometric toolkit for further model searches in the framework of toric geometry. Finally, an explicit global model with three chiral generations and all required Yukawa couplings is defined on a Calabi-Yau fourfold which is fibered over the del Pezzo transition of the Fano threefold P^4[4].

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