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题名: Primordial non-Gaussianities from the trispectra in multiple field inflationary models
作者: Gao, Xian ;  Li, Miao ;  Lin, Chunshan
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2009
期号: 11, 页码:-
关键词: COSMIC-STRING PRODUCTION ;  COSMOLOGICAL PERTURBATIONS ;  BRID INFLATION ;  K-INFLATION ;  CURVATON
学科分类: Physics
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
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
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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000272271900007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5220
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Gao, Xian,Li, Miao,Lin, Chunshan. Primordial non-Gaussianities from the trispectra in multiple field inflationary models[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2009(11):-.
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