Non-Gaussianity in DHOST inflation

被引：2

作者：

Brax, Philippe ^{[1
]}

Lazanu, Andrei ^{[2
]}

机构：

[1] Univ Paris Saclay, Inst Phys Theor, CNRS, CEA, F-91191 Gif Sur Yvette, France

[2] Univ Paris, Sorbonne Univ, Univ PSL, Lab Phys,Ecole Normale Super,CNRS, F-75005 Paris, France

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2022年 / 01期

基金：

欧盟地平线“2020”;

关键词：

inflation; non-gaussianity; physics of the early universe; PRIMORDIAL NON-GAUSSIANITY; POWER SPECTRUM; BISPECTRUM; FLUCTUATIONS;

D O I：

10.1088/1475-7516/2022/01/026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

DHOST inflation models where deviations from a pure de Sitter background are induced by an axion-like potential can lead to large non-Gaussianities. We investigate the nature of non-Gaussianities in these models and compare to the results given by the Planck experiment. The overlap between the DHOST non-Gaussianities and the equilateral, orthogonal and local templates can be rendered arbitrarily small. On the other hand, this does not preclude DHOST models from showing large non-Gaussianities as exemplified by their reduced bispectrum. As a result, they could be probed by future experiments and also by a more thorough analysis of the existing Planck data.

引用

页数：27

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