Large non-Gaussianities with intermediate shapes from quasi-single-field inflation

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	Large non-Gaussianities with intermediate shapes from quasi-single-field inflation
	Chen, Xingang; Wang, Yi; Chen, XG , MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA
刊名	PHYSICAL REVIEW D
	2010
卷号	81 期号:6 页码:-
关键词	Perturbations Flatness Universe Horizon
ISSN号	1550-7998
英文摘要	We study the slow-roll inflation models, where the inflaton slow-rolls along a trajectory whose orthogonal directions are lifted by potentials with masses of order the Hubble parameter. In these models large non-Gaussianities can be generated through the transformation from the isocurvature modes to the curvature mode, once the inflaton trajectory turns. We find large bispectra with a one-parameter family of novel shapes, interpolating between the equilateral and local shape. According to the in-in formalism, the shapes of these non-Gaussianities are different from a simple projection from the isocurvature non-Gaussian correlation functions.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000276195700028
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5147]
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 , MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA
推荐引用方式 GB/T 7714	Chen, Xingang,Wang, Yi,Chen, XG , MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA. Large non-Gaussianities with intermediate shapes from quasi-single-field inflation[J]. PHYSICAL REVIEW D,2010,81(6):-.
APA	Chen, Xingang,Wang, Yi,&Chen, XG , MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA.(2010).Large non-Gaussianities with intermediate shapes from quasi-single-field inflation.PHYSICAL REVIEW D,81(6),-.
MLA	Chen, Xingang,et al."Large non-Gaussianities with intermediate shapes from quasi-single-field inflation".PHYSICAL REVIEW D 81.6(2010):-.