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arXiv 1012.3179hep-th
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杂种优势网络的转变

Transitions in the Web of Heterotic Vacua

Lara B. Anderson, James Gray, Burt Ovrut

摘要:

我们用两种互补的方法--有效四维场论和相应的几何学分析了具有不同规范束的杂化真空之间的跃迁。从有效场论的观点来看,这种转变发生在与异质稳定壁相关的势能的平坦方向之间。几何上,这个分支结构对应于耦合到凯勒模空间腔室结构的规范丛的光滑变形。我们展示了这样的转变如何改变有效理论的重要性质,包括规范对称性和无质量谱。几何上,这项研究分为变形的向量丛保持的规范丛的秩和那些改变的秩。在后一种情况下,我们的结果提供了一类Li-Yau型变形问题的显式解。最后,我们利用稳定壁框架及其有效理论研究了Calabi-Yau三重上的Donaldson-Thomas不变量。

英文摘要:

We analyze transitions between heterotic vacua with distinct gauge bundles using two complementary methods - the effective four-dimensional field theory and the corresponding geometry. From the viewpoint of effective field theory, such transitions occur between flat directions of the potential energy associated with heterotic stability walls. Geometrically, this branch structure corresponds to smooth deformations of the gauge bundle coupled to the chamber structure of Kähler moduli space. We demonstrate how such transitions can change important properties of the effective theory, including the gauge symmetry and the massless spectrum. Geometrically, this study is divided into deformations of the vector bundle which preserve the rank of the gauge bundle and those which change the rank. In the latter case, our results provide explicit solutions to a class of Li-Yau type deformation problems. Finally, we use the framework of stability walls and their effective theory to study Donaldson-Thomas invariants on Calabi-Yau threefolds.

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