Feeding your inflaton: non-Gaussian signatures of interaction structure

Feeding your inflaton: non-Gaussian signatures of interaction structure
复制标题

喂养你的暴胀子:相互作用结构的非高斯特征

DOI:
--
复制
发表时间:
2011
期刊:
影响因子:
--
通讯作者:
S. Shandera
S. Shandera
中科院分区:
--
文献类型:
--
作者:
N. Barnaby;S. Shandera

文献摘要

参考文献

被引文献

相似文献

原初非高斯性是由暴胀场的相互作用产生的,要么是自相互作用,要么是与其他部分的耦合。这两种物理上不同的机制可以导致几乎无法区分的等边型双谱,但在高阶矩的相对缩放中产生不同的模式。我们在一个简单有效的场论框架中说明了这些类,其中暴胀势的平坦度受到轻微破缺的位移对称性的保护。由于两类相互作用之间的显着差异是矩的缩放,因此我们研究了依赖于矩序列的可观察量的含义。我们获得了任意矩结构的闵可夫斯基泛函和晕质量函数的解析表达式,并使用它们来演示如何通过观察区分不同类别的相互作用。我们的分析揭示了许多理论问题,特别是我们澄清了使波动分布接近高斯的物理原理与使计算保持受控的物理原理之间的区别。
Primordial non-Gaussianity is generated by interactions of the inflaton field, either self-interactions or couplings to other sectors. These two physically different mechanisms can lead to nearly indistinguishable bispectra of the equilateral type, but generate distinct patterns in the relative scaling of higher order moments. We illustrate these classes in a simple effective field theory framework where the flatness of the inflaton potential is protected by a softly broken shift symmetry. Since the distinctive difference between the two classes of interactions is the scaling of the moments, we investigate the implications for observables that depend on the series of moments. We obtain analytic expressions for the Minkowski functionals and the halo mass function for an arbitrary structure of moments, and use these to demonstrate how different classes of interactions might be distinguished observationally. Our analysis casts light on a number of theoretical issues, in particular we clarify the difference between the physics that keeps the distribution of fluctuations nearly Gaussian, and the physics that keeps the calculation under control.
探测闵可夫斯基泛函的新方法
DOI: 10.1093/mnras/stt1189
发表时间: 2013
影响因子: 4.8
作者:
Munshi D
通讯作者: Munshi D
DOI: 10.1088/0067-0049/192/2/18
发表时间: 2011-02-01
影响因子: 8.7
作者:
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者: Wright, E. L.
DOI: 10.1088/0004-637x/704/1/672
发表时间: 2009-08
期刊: The Astrophysical Journal
影响因子: --
作者:
Myung-Kook Jee;P. Rosati;H. Ford;K. Dawson;C. Lidman;S. Perlmutter;R. Demarco;V. Strazzullo;C. Mullis;H. Böhringer;R. Fassbender
通讯作者: Myung-Kook Jee;P. Rosati;H. Ford;K. Dawson;C. Lidman;S. Perlmutter;R. Demarco;V. Strazzullo;C. Mullis;H. Böhringer;R. Fassbender