de Sitter真空中具有规范R对称性的超引力暴胀
Inflation from Supergravity with Gauged R-symmetry in de Sitter Vacuum
摘要：
我们研究了最近的超对称性破缺模型的宇宙学，在一个可调的正宇宙学常数的存在下，基于一个规范的位移对称性的弦模，可以确定与字符串的电子。最小的频谱的“隐藏”超对称性破缺部门，然后由一个矢量多重峰，测量的位移对称性的的介子多重峰，当耦合到MSSM导致一个独特的低能量现象取决于一个参数。在这里，我们研究的问题，如果这个模型也可以导致通货膨胀，通过识别的暴胀子。我们发现，这是可能的，如果凯勒势被一个具有NS 5-膜瞬子形式的项修改，导致一个适当的暴胀平台周围的标量势的最大值，取决于两个额外的参数。这个模型与目前的宇宙学观测是一致的，而不修改与标量势最小值相关的低能粒子唯象学现象。
英文摘要：
We study the cosmology of a recent model of supersymmetry breaking, in the presence of a tuneable positive cosmological constant, based on a gauged shift symmetry of a string modulus that can be identified with the string dilaton. The minimal spectrum of the `hidden' supersymmetry breaking sector consists then of a vector multiplet that gauges the shift symmetry of the dilaton multiplet and when coupled to the MSSM leads to a distinct low energy phenomenology depending on one parameter. Here we study the question if this model can also lead to inflation by identifying the dilaton with the inflaton. We find that this is possible if the Kähler potential is modified by a term that has the form of NS5-brane instantons, leading to an appropriate inflationary plateau around the maximum of the scalar potential, depending on two extra parameters. This model is consistent with present cosmological observations without modifying the low energy particle phenomenology associated to the minimum of the scalar potential.
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