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arXiv 0705.3253hep-th
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N=1型IIB紧化的非微扰修正和模性

Non-Perturbative Corrections and Modularity in N=1 Type IIB Compactifications

Thomas W. Grimm

摘要:

讨论了四维IIB型Calabi-Yau定向褶皱的非微扰修正和模性质。结果表明,某些非微扰的α '修正生存在大体积限制的orientifold和周期性校正的Kahler势。这些修正依赖于NS-NS两种形式,并且必须由D-瞬子贡献来完成,以在IIB型定向折叠背景的对称性下进行协变变换。它表明,一般也D-瞬子超势依赖于两种形式的模量,以及对复杂的电子。这些贡献可以通过θ-函数产生,θ子作为模参数。Enriques Calabi-Yau的orientifold可以说明这些一般性的考虑。结果表明,这种紧化导致一个受控的四维N=1的有效理论,由于各种量子校正的情况下。联系到基本的拓扑弦论,D-瞬子超势被认为与Enriques Calabi-Yau上的一个特定的模形式有关,该模形式计算D3,D1,D(-1)简并。

英文摘要:

Non-perturbative corrections and modular properties of four-dimensional type IIB Calabi-Yau orientifolds are discussed. It is shown that certain non-perturbative alpha' corrections survive in the large volume limit of the orientifold and periodically correct the Kahler potential. These corrections depend on the NS-NS two form and have to be completed by D-instanton contributions to transform covariantely under symmetries of the type IIB orientifold background. It is shown that generically also the D-instanton superpotential depends on the two-form moduli as well as on the complex dilaton. These contributions can arise through theta-functions with the dilaton as modular parameter. An orientifold of the Enriques Calabi-Yau allows to illustrate these general considerations. It is shown that this compactification leads to a controlled four-dimensional N=1 effective theory due to the absence of various quantum corrections. Making contact to the underlying topological string theory the D-instanton superpotential is proposed to be related to a specific modular form counting D3, D1, D(-1) degeneracies on the Enriques Calabi-Yau.

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