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Consistency relation for the Lorentz invariant single-field inflation
Huang, Qing-Guo; Huang, QG , Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
2010
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
期号5页码:-
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.
部门归属[Huang, QG] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China; [Huang, QG] Korea Inst Adv Study, Sch Phys, Seoul 130722, South Korea
关键词K-inflation Perturbations
学科领域Physics
资助者Chinese Academy of Science ; Chinese Academy of Science ; Chinese Academy of Science ; Chinese Academy of Science
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收录类别SCI
资助者Chinese Academy of Science ; Chinese Academy of Science ; Chinese Academy of Science ; Chinese Academy of Science
WOS记录号WOS:000279490800024
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5119
专题理论物理所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
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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):-.
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