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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
Primordial non-Gaussianities from the trispectra in multiple field inflationary models
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
KeywordCosmic-string Production Cosmological Perturbations Brid Inflation K-inflation Curvaton
AbstractWe 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.
2009
ISSN1475-7516
Issue11Pages:-
Subject AreaPhysics
Indexed BySCI
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Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5220
Collection理论物理所科研产出_SCI论文
Corresponding AuthorGao, X , Chinese Acad Sci, Kavli Inst Theoret Phys, Key Lab Frontiers Theoret Phys, 55 ZhonggGuanCun E St, Beijing 100190, Peoples R China
Recommended Citation
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):-.
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