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Huang, Qing-Guo; Huang, QG , Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
Negative spectral index of f(NL) in the axion-type curvaton model
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
KeywordNon-gaussianity Scalar Field Perturbations Inflation Scenario Fluctuations
AbstractWe derive the spectral index of f(NL) and its running from isocurvature single field and investigate the curvaton models with a negative spectral index of f(NL) in detail. In particular, a numerical study of the axion-type curvaton model is illustrated, and we find that the spectral index of f(NL) is negative and its absolute value is maximized around sigma(*) = pi f/2 for the potential V (sigma) = m(2)f(2)(1 - cos sigma/f). The spectral index of f(NL) can be O(-0.1) for the axion-type curvaton model. A convincing detection of a positive n(fNL) will rule out the axion-type curvaton model. In addition, we also give a general discussion about the detectable parameter space for the curvaton model with a polynomial potential.
2010
ISSN1475-7516
Issue11Pages:-
Subject AreaPhysics
Indexed BySCI
Funding OrganizationChinese Academy of Science; NSFC ; Chinese Academy of Science; NSFC ; Chinese Academy of Science; NSFC ; Chinese Academy of Science; NSFC
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Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5023
Collection理论物理所科研产出_SCI论文
Corresponding AuthorHuang, QG , Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Huang, Qing-Guo,Huang, QG , Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China. Negative spectral index of f(NL) in the axion-type curvaton model[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(11):-.
APA Huang, Qing-Guo,&Huang, QG , Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.(2010).Negative spectral index of f(NL) in the axion-type curvaton model.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(11),-.
MLA Huang, Qing-Guo,et al."Negative spectral index of f(NL) in the axion-type curvaton model".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .11(2010):-.
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