F-theory Uplifts and GUTs
F-theory Uplifts and GUTs
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F 理论提升和 GUT
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
T. Weigand
中科院分区：
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作者：
R. Blumenhagen;Thomas W. Grimm;Benjamin Jurke;T. Weigand
研究了紧致Calabi-Yau三重上的IIB型定向褶皱模型的F-理论抬升，其中因子为del Pezzo曲面.我们考虑通过五次曲线的del Pezzo转变定义的两个例子。第一个模型有一个orientifold投影导致两个不相交的O 7-飞机和第二对合行为通过两个del Pezzo表面的交换。这两个隆起的四倍是一般奇异的最小规范增强的一个除数，并分别在非法诺基地的曲线。我们研究可能进一步退化的椭圆形纤维导致F-理论大统一模型的基础上的子群E8。
We study the F-theory uplift of Type IIB orientifold models on compact Calabi-Yau threefolds containing divisors which are del Pezzo surfaces. We consider two examples defined via del Pezzo transitions of the quintic. The first model has an orientifold projection leading to two disjoint O7-planes and the second involution acts via an exchange of two del Pezzo surfaces. The two uplifted fourfolds are generically singular with minimal gauge enhancements over a divisor and, respectively, a curve in the non-Fano base. We study possible further degenerations of the elliptic fiber leading to F-theory GUT models based on subgroups of E8.