Primordial non-Gaussianities from the trispectra in multiple field inflationary models

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	Primordial non-Gaussianities from the trispectra in multiple field inflationary models
	Gao, Xian; Li, Miao; Lin, Chunshan; Gao, X , Chinese Acad Sci, Kavli Inst Theoret Phys, Key Lab Frontiers Theoret Phys, 55 ZhonggGuanCun E St, Beijing 100190, Peoples R China
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2009
期号	11 页码:-
关键词	Cosmic-string Production Cosmological Perturbations Brid Inflation K-inflation Curvaton
ISSN号	1475-7516
英文摘要	We investigate the primordial non-Gaussianities from the trispectra in multi-field inflation models, which can be seen as generalization of multi-field k-inflation and multi-DBI inflation. We derive the full fourth-order perturbation action for the inflaton fields and evaluate the four-point correlation functions for the perturbations in the limit ca << 1 and c(e) << 1. There are three types of momentum-dependent shape functions which arise from three types of four-point interaction vertices. The final trispectrum of the curvature perturbation can be expressed in terms of the deformations and permutations of these three shape functions, and is determined by c(a), c(e), lambda, II which depend on the non-linear structure of the model and also the transfer function T(RS). We also discuss the parameter space for the trispectrum and plot the shape diagrams for the trispectrum both for visualization and for distinguishing different shapes from each other.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000272271900007
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5220]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Gao, X , Chinese Acad Sci, Kavli Inst Theoret Phys, Key Lab Frontiers Theoret Phys, 55 ZhonggGuanCun E St, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Gao, Xian,Li, Miao,Lin, Chunshan,et al. Primordial non-Gaussianities from the trispectra in multiple field inflationary models[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2009(11):-.
APA	Gao, Xian,Li, Miao,Lin, Chunshan,&Gao, X , Chinese Acad Sci, Kavli Inst Theoret Phys, Key Lab Frontiers Theoret Phys, 55 ZhonggGuanCun E St, Beijing 100190, Peoples R China.(2009).Primordial non-Gaussianities from the trispectra in multiple field inflationary models.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(11),-.
MLA	Gao, Xian,et al."Primordial non-Gaussianities from the trispectra in multiple field inflationary models".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .11(2009):-.