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arXiv 1004.5477hep-phhep-th
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高维规范理论中的暴胀子与曲率子

Inflaton versus Curvaton in Higher Dimensional Gauge Theories

Takeo Inami, Yoji Koyama, Chia-Min Lin, Shie Minakami

摘要:

我们基于高维规范理论构造了一个宇宙暴胀和微扰模型。暴胀子和曲率子是由存在于四维以上的规范场的额外空间分量产生的标量场。我们把在$T^2$上紧致化的六维Yang-Mills理论作为一个玩具模型,把暴胀子和曲率子的单圈有效势应用到曲率子情形.我们已经发现,曲率是次主导的线性曲率扰动,但一个显着的非高斯性和一个相当大的张量标量比产生。

英文摘要:

We construct a model of cosmological inflation and perturbation based on the higher-dimensional gauge theory. The inflaton and curvaton are the scalar fields arising from the extra space components of the gauge field living in more than four dimensions. We take the six-dimensional (6D) Yang-Mills theory compactified on $T^2$ as a toy model, and apply the one-loop effective potential of the inflaton and the curvaton to the curvaton scenario. We have found that the curvaton is subdominant for the linear curvature perturbation, but that a significant non-Gaussianity and a sizable tensor to scalar ratio are generated.

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