Primordial non-Gaussianities from the trispectra in multiple field inflationary models
文献类型：期刊论文
| 作者 | 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
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| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
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| 出版日期 | 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 |
| 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):-. |
入库方式： OAI收割
来源：理论物理研究所
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