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arXiv 0901.1182hep-th
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分数阶D3-Brane的非微扰效应

Non-Perturbative Effects on a Fractional D3-Brane

Gabriele Ferretti, Christoffer Petersson

摘要:

本文研究单个分数D ~ 3-膜世界体积的N=1阿贝尔规范理论。在引力相互作用不完全解耦的极限下,我们发现超势和费米子双线性凝聚是由D-膜瞬子效应产生的。一个相关的情况出现在一个孤立的循环不变量下的orientifold投影,即使在没有任何规范理论膜。此外,在超对称性破缺背景通量的存在下,这样的瞬子配置在4维有效作用量中诱导新的耦合,包括对宇宙学常数和非超对称质量项的非微扰贡献。

英文摘要:

In this note we study the N=1 abelian gauge theory on the world volume of a single fractional D3-brane. In the limit where gravitational interactions are not completely decoupled we find that a superpotential and a fermionic bilinear condensate are generated by a D-brane instanton effect. A related situation arises for an isolated cycle invariant under an orientifold projection, even in the absence of any gauge theory brane. Moreover, in presence of supersymmetry breaking background fluxes, such instanton configurations induce new couplings in the 4-dimensional effective action, including non-perturbative contributions to the cosmological constant and non-supersymmetric mass terms.

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