G-Curvaton
G-Curvaton
复制标题
G-曲线
DOI：
10.1016/j.physletb.2011.12.016
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发表时间：
2012-01-16
影响因子：
4.4
通讯作者：
Piao, Yun-Song
中科院分区：
文献类型：
--
作者：
Wang, Hua;Qiu, Taotao;Piao, Yun-Song
本文研究了一个曲率子模型，其中曲率子受伽利略场的作用。计算了暴胀过程中G曲率子涨落的功率谱，讨论了暴胀结束后G曲率子涨落如何转化为曲率微扰。我们估计了曲率扰动的双谱，并给出了非高斯性对模型参数的依赖关系。我们发现，我们的模型可以有相当大的局部和等边非高斯性高达O（10（2）），这是由一个明确的例子说明。(C)2011 Elsevier B.V.保留所有权利。
In this Letter, we study a curvaton model where the curvaton is acted by Galileon field. We calculate the power spectrum of fluctuation of G-Curvaton during inflation and discuss how it converts to the curvature perturbation after the end of inflation. We estimate the bispectrum of curvature perturbation induced, and show the dependence of non-Gaussianity on the parameters of model. It is found that our model can have sizable local and equilateral non-Gaussianities to up to O(10(2)), which is illustrated by an explicit example. (C) 2011 Elsevier B.V. All rights reserved.