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arXiv 0812.3391hep-th
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CFT中杂化丛的双标度极限与动力学变形

Double-Scaling Limit of Heterotic Bundles and Dynamical Deformation in CFT

Luca Carlevaro, Dan Israel, Marios Petropoulos

摘要:

我们考虑Eguchi-Hanson空间上的杂化弦论,它是六维通量紧化中解析A_1奇异性的局部模型,其中阿贝尔规范丛是开启的,挠率是非零的.我们证明了在一个合适的双标度极限中,在非零双圈附近的物理被隔离,可以找到一个世界面共形场论描述,它包含一个目标空间共形于Eguchi-Hanson的杂化陪集.从奇点的吹落极限出发,它可以看作是近视界五膜背景的动力学变形。我们详细分析了频谱的理论在特定的例子,以及世界面非微扰效应的重要作用。

英文摘要:

We consider heterotic string theory on Eguchi-Hanson space, as a local model of a resolved A_1 singularity in a six-dimensional flux compactification, with an Abelian gauge bundle turned on and non-zero torsion. We show that in a suitable double scaling limit, that isolates the physics near the non-vanishing two-cycle, a worldsheet conformal field theory description can be found. It contains a heterotic coset whose target space is conformal to Eguchi-Hanson. Starting from the blow-down limit of the singularity, it can be viewed as a dynamical deformation of the near-horizon fivebrane background. We analyze in detail the spectrum of the theory in particular examples, as well as the important role of worldsheet non-perturbative effects.

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