Non-Gaussianity from two right-handed sneutrino curvaton decays

被引：0
|
作者：
Lu-Yun Lee
Chia-Min Lin
机构：
[1] National Tsing Hua University,Department of Physics
[2] Institute of Physics,Department of Physics
[3] Academia Sinica,undefined
[4] Kobe University,undefined
来源：
General Relativity and Gravitation | 2012年 / 44卷
关键词：
Inflation; Curvaton; Non-Gaussianity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this paper, we consider the effect of two right-handed sneutrino curvaton decays and investigate the parameter space. We compare the difference of the result between single- and two-curvaton cases. We find one Yukawa coupling of the right-handed snetrinos can be as large as λ ~ 0.1 while the other one is much smaller. When the curvatons decay, we assume both of them subdominate the energy density of the universe. We find that, unlike a single curvaton case, here a small or negative, as well as a large fNL can be generated.
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页码：2433 / 2447
页数：14
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