Suppressed non-Gaussianity in the curvaton model

被引：7
|
作者：
Mukaida, Kyohei [1 ]
Nakayama, Kazunori [1 ,2 ]
Takimoto, Masahiro [1 ]
机构：
[1] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
[2] Univ Tokyo, Kavli Inst Phys & Math Universe, Todai Inst Adv Study, Kashiwa, Chiba 2778583, Japan
来源：
PHYSICAL REVIEW D | 2014年 / 89卷 / 12期
关键词：
PERTURBATIONS; HORIZON;
D O I：
10.1103/PhysRevD.89.123515
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We show that the local type non-Gaussianity in a class of curvaton models is suppressed, i.e., the nonlinearity parameters f(NL) and those related with higher order statistics can be at most O(1), even if the curvaton energy density is subdominant at the decay. This situation is naturally realized in a very simple curvaton potential with quadratic term plus quartic term.
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页数：5
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