On Fluxed Instantons and Moduli Stabilisation in IIB Orientifolds and F-theory
On Fluxed Instantons and Moduli Stabilisation in IIB Orientifolds and F-theory
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关于 IIB 方向折叠和 F 理论中的流动瞬时子和模稳定性
DOI：
10.1103/physrevd.84.066001
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发表时间：
2011
影响因子：
5
通讯作者：
T. Weigand
中科院分区：
文献类型：
--
作者：
Thomas W. Grimm;Max Kerstan;Eran Palti;T. Weigand
我们研究了由携带瞬子通量的欧几里得 D3 膜瞬子引起的超势，特别强调了它对于稳定 IIB 型东方褶皱中的卡勒模量和 Neveu-Schwarz 轴子的意义。相当普遍的是，一旦手性可观测扇区被包含在致密化中，在与世界体积通量相交的 D7 膜上出现，产生的带电瞬子零模式会阻止一类瞬子参与模量稳定。我们证明欧几里德 D3 膜上的瞬时通量可以消除这些额外的零模式，并有助于恢复几何范围内的完全模量稳定性。我们还评论了这种减轻模量稳定性和手性之间的普遍张力效应的 F 理论描述。此外，我们提出了解决该问题的另一种解决方案，即用带电物质场修饰瞬时子，这是F理论所独有的，并且在弱耦合极限下无法实现。
We study the superpotential induced by Euclidean D3-brane instantons carrying instanton flux, with special emphasis on its significance for the stabilisation of Kahler moduli and Neveu-Schwarz axions in Type IIB orientifolds. Quite generally, once a chiral observable sector is included in the compactification, arising on intersecting D7-branes with world-volume flux, resulting charged instanton zero modes prevent a class of instantons from participating in moduli stabilisation. We show that instanton flux on Euclidean D3-branes can remove these extra zero modes and helps in reinstating full moduli stabilisation within a geometric regime. We comment also on the F-theoretic description of this effect of alleviating the general tension between moduli stabilisation and chirality. In addition we propose an alternative solution to this problem based on dressing the instantons with charged matter fields which is unique to F-theory and cannot be realised in the weak coupling limit.