Non- Gaussianity from Attractor Curvaton
Non- Gaussianity from Attractor Curvaton
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来自吸引子 Curvaton 的非高斯性
DOI：
10.1103/physrevd.87.063514
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发表时间：
2013
影响因子：
5
通讯作者：
張ヶ谷圭介
中科院分区：
文献类型：
--
作者：
張ケ谷圭介;伊部雅裕;柳田勉;張ヶ谷圭介;張ヶ谷圭介
我们提出了一个曲率模型，其中曲率振荡的初始条件由它在膨胀期间的吸引子行为决定。假设一个混沌暴胀模型，我们发现由吸引子行为决定的初始条件适合于对曲率扰动产生相当大的非高斯性贡献，这将在可预见的未来进行测试。对宇宙热历史和粒子物理模型的影响也进行了讨论。
We propose a curvaton model in which the initial condition of the curvaton oscillation is determined by its attractor behavior during inflation. Assuming a chaotic inflation model, we find that the initial condition determined by the attractor behavior is appropriate to generate a sizable non-Gaussianity contribution to the curvature perturbation, which will be tested in the foreseeable future. Implications on the thermal history of the Universe and on particle physics models are also discussed.