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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
2009
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
期号11页码:-
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.
部门归属[Gao, X; Li, M; Lin, CS] Chinese Acad Sci, Kavli Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China; [Lin, CS] Univ Sci & Technol China, Interdisciplinary Ctr Theoret Study, Hefei 230026, Anhui, Peoples R China
关键词Cosmic-string Production Cosmological Perturbations Brid Inflation K-inflation Curvaton
学科领域Physics
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收录类别SCI
WOS记录号WOS:000272271900007
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5220
专题理论物理所SCI论文
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
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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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