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题名: Large non-Gaussianities with intermediate shapes from quasi-single-field inflation
作者: Chen, Xingang ;  Wang, Yi
刊名: PHYSICAL REVIEW D
出版日期: 2010
卷号: 81, 期号:6, 页码:-
关键词: PERTURBATIONS ;  FLATNESS ;  UNIVERSE ;  HORIZON
学科分类: Physics
通讯作者: Chen, XG , MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA
部门归属: [Chen, XG] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA; [Chen, XG] Univ Cambridge, Ctr Theoret Cosmol, DAMTP, Cambridge CB3 0WA, England; [Wang, Y] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada; [Wang, Y] Chinese Acad Sci, Inst Theoret Phys, KITPC, Beijing 100190, Peoples R China
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.
资助者: US DOE[DEFG02-05ER41360]; NSFC; NSERC; IPP
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000276195700028
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5147
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:
Chen, Xingang,Wang, Yi. Large non-Gaussianities with intermediate shapes from quasi-single-field inflation[J]. PHYSICAL REVIEW D,2010,81(6):-.
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