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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
2010
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号81期号:6页码:-
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.
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
关键词Perturbations Flatness Universe Horizon
学科领域Physics
资助者US DOE[DEFG02-05ER41360]; NSFC; NSERC; IPP ; US DOE[DEFG02-05ER41360]; NSFC; NSERC; IPP ; US DOE[DEFG02-05ER41360]; NSFC; NSERC; IPP ; US DOE[DEFG02-05ER41360]; NSFC; NSERC; IPP
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收录类别SCI
资助者US DOE[DEFG02-05ER41360]; NSFC; NSERC; IPP ; US DOE[DEFG02-05ER41360]; NSFC; NSERC; IPP ; US DOE[DEFG02-05ER41360]; NSFC; NSERC; IPP ; US DOE[DEFG02-05ER41360]; NSFC; NSERC; IPP
WOS记录号WOS:000276195700028
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被引频次:135[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5147
专题理论物理所1978-2010年知识产出
通讯作者Chen, XG , MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA
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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):-.
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