Consistency relation for the Lorentz invariant single-field inflation
文献类型：期刊论文
| 作者 | Huang, Qing-Guo ; Huang, QG , Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, 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 | 2010 |
| 期号 | 5页码:- |
| 关键词 | K-inflation Perturbations |
| ISSN号 | 1475-7516 |
| 英文摘要 | In this paper we compute the sizes of equilateral and orthogonal shape bispectrum for the general Lorentz invariant single-field inflation. The stability of field theory implies a non-negative square of sound speed which leads to a consistency relation between the sizes of orthogonal and equilateral shape bispectrum, namely f(NLorth.) <= -0.054f(NL)(equil.). In particular, for the single-field Dirac-Born-Infeld (DBI) inflation, the consistency relation becomes f(NL)(orth.) = 0.070f(NL)(equil.) <= 0. These consistency relations are also valid in the mixed scenario where the quantum fluctuations of some other light scalar fields contribute to a part of total curvature perturbation on the super-horizon scale and may generate a local form bispectrum. A distinguishing prediction of the mixed scenario is tau(loc.)(NL) > (6/5 f(NL)(loc.) )(2). Comparing these consistency relations to WMAP 7yr data, there is still a big room for the Lorentz invariant inflation, but DBI inflation has been disfavored at more than 68% CL. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000279490800024 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5119]  |
| 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 | Huang, QG , Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Qing-Guo,Huang, QG , Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China. Consistency relation for the Lorentz invariant single-field inflation[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(5):-. |
| APA | Huang, Qing-Guo,&Huang, QG , Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China.(2010).Consistency relation for the Lorentz invariant single-field inflation.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(5),-. |
| MLA | Huang, Qing-Guo,et al."Consistency relation for the Lorentz invariant single-field inflation".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .5(2010):-. |
入库方式： OAI收割
来源：理论物理研究所
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