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arXiv 1409.8299hep-thhep-ph
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高曲率超引力引起的超对称破缺和暴胀

Supersymmetry Breaking and Inflation from Higher Curvature Supergravity

I. Dalianis, F. Farakos, A. Kehagias, A. Riotto, R. von Unge

摘要:

一般嵌入的$R+R^2$高曲率理论到旧的最小超引力导致丰富的真空结构,除了其众所周知的暴胀性质的模型。当模型具有精确的R对称性时,存在一个具有单一超对称闵可夫斯基真空的暴胀相。这似乎是一个更一般的设置的特殊情况,原则上可能包括仍然是纯超引力起源的R对称性破坏项。通过包括后者,我们发现新的超对称破缺真空兼容的单场暴胀轨迹。我们明确地讨论了两个这样的模型,我们说明了暴胀是如何被驱动的超对称破缺真空后,暴胀阶段。在这些模型中,引力子的质量与暴胀子的质量在同一量级。因此,纯高曲率超引力不仅可以容纳适当的暴胀子场,而且还可以在暴胀结束后为超对称破缺提供适当的隐藏扇区。

英文摘要:

The generic embedding of the $R+R^2$ higher curvature theory into old-minimal supergravity leads to models with rich vacuum structure in addition to its well-known inflationary properties. When the model enjoys an exact R-symmetry, there is an inflationary phase with a single supersymmetric Minkowski vacuum. This appears to be a special case of a more generic set-up, which in principle may include R-symmetry violating terms which are still of pure supergravity origin. By including the latter terms, we find new supersymmetry breaking vacua compatible with single-field inflationary trajectories. We discuss explicitly two such models and we illustrate how the inflaton is driven towards the supersymmetry breaking vacuum after the inflationary phase. In these models the gravitino mass is of the same order as the inflaton mass. Therefore, pure higher curvature supergravity may not only accommodate the proper inflaton field, but it may also provide the appropriate hidden sector for supersymmetry breaking after inflation has ended.

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