G(4)-flux, chiral matter and singularity resolution in F-theory compactifications

G(4)-flux, chiral matter and singularity resolution in F-theory compactifications
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F 理论紧致化中的 G(4)-通量、手性物质和奇点解析

DOI:
10.1016/j.nuclphysb.2011.12.013
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发表时间:
2012
期刊:
Nuclear Physics
影响因子:
--
通讯作者:
Weigand
Weigand
中科院分区:
--
文献类型:
--
作者:
Krause;Mayrhofer;Weigand

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构造了Calabi-Yau四倍上全局f -理论紧化的一组手性诱导g4通量。特别强调在f理论GUT模型构建的背景下,与规范群SU(5)×U(1) x相关的模型,这些模型是用U(1)受限的Tate模型来描述的。g4通量的产生方式完全类似于U(1) x表电位。我们详细描述了通过放大各种奇点的分辨率,这些奇点负责U(1) x因子和标准SU(5)规范群,并将结果与在环形几何背景下应用的技术相匹配。这提供了在物质曲线和汤川耦合相关的增强点上解析纤维结构的明确识别。我们计算了SU(5)带电物质和SU(5)单重态物质在不包含在SU(5)轨迹上的曲线上仅在U(1) x下带电的SU(5)单重态的通量诱导手性指数。进一步讨论了三维蝌蚪抵消、d项超对称和Freed-Witten量子化等全局一致性条件。U(1)Xgauge通量是一类分离光谱覆盖束的全局扩展。它是构建具有手性物质的全局定义的f理论紧化的重要组成部分。我们举例说明了一个三代SU(5)×U(1) x模型,其通量满足上述所有全局一致性条件。我们还将结果推广到无U(1)限制的模型中的手性通量。
We construct a set of chirality inducing G4-fluxes in global F-theory compactifications on Calabi–Yau four-folds. Special emphasis is put on models with gauge group SU(5)×U(1)Xrelevant in the context of F-theory GUT model building, which are described in terms of a U(1)-restricted Tate model. A G4-flux arises in a manner completely analogous to the U(1)Xgauge potential. We describe in detail the resolution by blow-up of the various singularities responsible for the U(1)Xfactor and the standard SU(5) gauge group and match the result with techniques applied in the context of toric geometry. This provides an explicit identification of the structure of the resolved fibre over the matter curves and over the enhancement points relevant for Yukawa couplings. We compute the flux-induced chiral index both of SU(5) charged matter and of SU(5) singlets charged only under U(1)Xlocalised on curves which are not contained in the SU(5) locus. We furthermore discuss global consistency conditions such as D3-tadpole cancellation, D-term supersymmetry and Freed–Witten quantisation. The U(1)Xgauge flux is a global extension of a class of split spectral cover bundles. It constitutes an essential ingredient in the construction of globally defined F-theory compactifications with chiral matter. We exemplify this in a three-generation SU(5)×U(1)Xmodel whose flux satisfies all of the above global consistency conditions. We also extend our results to chiral fluxes in models without U(1) restriction.
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