de Sitter vacuum from R^2 supergravity
de Sitter vacuum from R^2 supergravity
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R^2 超重力的德西特真空
DOI：
10.1103/physrevd.92.105027
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Yusuke Yamada
中科院分区：
文献类型：
--
作者：
Fuminori Hasegawa;Yusuke Yamada
我们提出了一个具有约束曲率多重体的超引力模型，该模型同时实现了当前宇宙中的斯塔宾斯基暴胀和德西特真空。令人惊讶的是，在真空中，最小超对称标准模型扇区的软超对称破缺尺度变成了TeV尺度；然而，引力子的质量尺度比软超对称破缺的质量尺度要高得多。这样的层次结构，自然地避免了引力子问题，在没有引入暴胀尺度以外的新尺度的情况下出现。
We propose a supergravity model with a constrained curvature multiplet, which realizes the Starobinsky inflation and the de Sitter vacuum in the present Universe simultaneously. Surprisingly, at the vacuum, the soft supersymmetry-breaking scale for the minimal supersymmetric standard model sector becomes the TeV scale; however, the gravitino mass scale becomes much higher than that of soft supersymmetry breaking. Such a hierarchical structure, which naturally avoids the gravitino problem, appears without introducing a new scale other than the inflation scale.