Quasi-single field inflation and non-Gaussianities

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	Quasi-single field inflation and non-Gaussianities
	Chen, Xingang; Wang, Yi; Chen, XG , Univ Cambridge, Dept Appl Math & Theoret Phys, Ctr Theoret Cosmol, Wilberforce Rd, Cambridge CB3 0WA, England
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2010
期号	4 页码:-
关键词	Expectation Value Formalism Parameter f(Nl) K-inflation Perturbations Scenario Flatness Universe Curvaton Horizon
ISSN号	1475-7516
英文摘要	In quasi-single field inflation models, massive isocurvature modes, that are coupled to the inflaton and have mass of order the Hubble parameter, can have nontrivial impacts on density perturbations, especially non-Gaussianities. We study a simple example of quasi-single field inflation in terms of turning inflaton trajectory. Large bispectra with a one-parameter family of novel shapes arise, lying between the well-known local and equilateral shape. The trispectra can also be very large and its magnitude t(NL) can be much larger than f(NL)(2).
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000277684600006
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5138]
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	Chen, XG , Univ Cambridge, Dept Appl Math & Theoret Phys, Ctr Theoret Cosmol, Wilberforce Rd, Cambridge CB3 0WA, England
推荐引用方式 GB/T 7714	Chen, Xingang,Wang, Yi,Chen, XG , Univ Cambridge, Dept Appl Math & Theoret Phys, Ctr Theoret Cosmol, Wilberforce Rd, Cambridge CB3 0WA, England. Quasi-single field inflation and non-Gaussianities[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(4):-.
APA	Chen, Xingang,Wang, Yi,&Chen, XG , Univ Cambridge, Dept Appl Math & Theoret Phys, Ctr Theoret Cosmol, Wilberforce Rd, Cambridge CB3 0WA, England.(2010).Quasi-single field inflation and non-Gaussianities.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(4),-.
MLA	Chen, Xingang,et al."Quasi-single field inflation and non-Gaussianities".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .4(2010):-.