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arXiv 1206.0754hep-thhep-ph
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超临界背景中的软膜

Soft branes in supersymmetry-breaking backgrounds

Paul McGuirk, Gary Shiu, Fang Ye

摘要:

我们重新分析了有效场论的非超对称扰动导致的IIB型超弦的超对称通量紧化,着眼于那些导致从少量的反D3膜的反反应。独立的背景下,我们表明,低能量拉格朗日描述的一堆探测D3膜的波动表现出软超对称性破缺,尽管扰动的边缘运营商,没有充分考虑在以前的一些治疗。我们认为这表明,反D3膜或其他来源对超对称性的破缺可能是自发的,而不是明确的。为了支持这一点,我们考虑了一个反D3膜探测一个超对称配置的行动,并确定了相应的goldstino的候选人。

英文摘要:

We revisit the analysis of effective field theories resulting from non-supersymmetric perturbations to supersymmetric flux compactifications of the type-IIB superstring with an eye towards those resulting from the backreaction of a small number of anti-D3-branes. Independently of the background, we show that the low-energy Lagrangian describing the fluctuations of a stack of probe D3-branes exhibits soft supersymmetry breaking, despite perturbations to marginal operators that were not fully considered in some previous treatments. We take this as an indication that the breaking of supersymmetry by anti-D3-branes or other sources may be spontaneous rather than explicit. In support of this, we consider the action of an anti-D3-brane probing an otherwise supersymmetric configuration and identify a candidate for the corresponding goldstino.

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