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题名: Negative spectral index of f(NL) in the axion-type curvaton model
作者: Huang, Qing-Guo
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2010
期号: 11, 页码:-
关键词: NON-GAUSSIANITY ;  SCALAR FIELD ;  PERTURBATIONS ;  INFLATION ;  SCENARIO ;  FLUCTUATIONS
学科分类: Physics
通讯作者: Huang, QG , Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
部门归属: Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: We 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.
资助者: Chinese Academy of Science; NSFC
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000284825100026
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5023
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Huang, Qing-Guo. Negative spectral index of f(NL) in the axion-type curvaton model[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(11):-.
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