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Curvaton with nonminimal derivative coupling to gravity: Full perturbation analysis
Feng, KX; Qiu, TT; Feng, KX (reprint author), Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China.
2014
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号90期号:12页码:123508
摘要In our previous paper [K. Feng, T. Qiu, and Y.-S. Piao, Phys. Lett. B 729, 99 (2014)], we have shown a curvaton model where the curvaton has a nonminimal derivative coupling to gravity. Such a coupling could cause scale invariance of the perturbations for a wide range of constant values of the equation of state of the cosmic background at the early time. In this paper, we continue our study by fully analyzing its perturbations up to the third order. Apart from the usual 2-point correlation function that have already been calculated in Feng, Qiu, and Piao [Phys. Lett. B 729, 99 (2014)], we also take into account the 3-point correlation functions, including the pure scalar part, the pure tensor part, and the cross-correlations between scalar and tensor perturbation modes. We find that for the pure scalar part, the 3-point correlation functions can generate non-Gaussianities that fit the PLANCK data very well. For the pure tensor and mixed parts, the shape functions have peaks at squeezed and equilateral limits, respectively, responsible for sizable f(NL)(sqz) and f(NL)(eql), which could be tested by the future observational data.
部门归属[Feng, Kaixi] Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
关键词Non-gaussianity Inflation Cosmology Scenario Scalar
学科领域Physics
资助者State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804]
DOI10.1103/PhysRevD.90.123508
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收录类别SCI
语种英语
资助者State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF131CJ1]; NSFC [11222546]; National Basic Research Program of China [2010CB832804]
WOS记录号WOS:000346830000002
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15549
专题理论物理所SCI论文
通讯作者Feng, KX (reprint author), Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China.
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GB/T 7714
Feng, KX,Qiu, TT,Feng, KX . Curvaton with nonminimal derivative coupling to gravity: Full perturbation analysis[J]. PHYSICAL REVIEW D,2014,90(12):123508.
APA Feng, KX,Qiu, TT,&Feng, KX .(2014).Curvaton with nonminimal derivative coupling to gravity: Full perturbation analysis.PHYSICAL REVIEW D,90(12),123508.
MLA Feng, KX,et al."Curvaton with nonminimal derivative coupling to gravity: Full perturbation analysis".PHYSICAL REVIEW D 90.12(2014):123508.
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