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:
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复制
发表时间:
2011
期刊:
影响因子:
--
通讯作者:
S. Shandera
中科院分区:
文献类型:
--
作者:
N. Barnaby;S. Shandera
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.
影响因子:
4.8
作者:
Munshi D
通讯作者:
Munshi D
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:
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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