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题名: Quasi-single field inflation and non-Gaussianities
作者: Chen, Xingang ;  Wang, Yi
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2010
期号: 4, 页码:-
关键词: EXPECTATION VALUE FORMALISM ;  PARAMETER F(NL) ;  K-INFLATION ;  PERTURBATIONS ;  SCENARIO ;  FLATNESS ;  UNIVERSE ;  CURVATON ;  HORIZON
学科分类: Physics
通讯作者: Chen, XG , Univ Cambridge, Dept Appl Math & Theoret Phys, Ctr Theoret Cosmol, Wilberforce Rd, Cambridge CB3 0WA, England
部门归属: [Chen, XG] Univ Cambridge, Dept Appl Math & Theoret Phys, Ctr Theoret Cosmol, Cambridge CB3 0WA, England; [Chen, XG] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA; [Wang, Y] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada; [Wang, Y] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
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).
资助者: Stephen Hawking advanced fellowship; US DOE[DEFG02-05ER41360]; NSERC; IPP postdoctoral fellowship
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000277684600006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5138
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Recommended Citation:
Chen, Xingang,Wang, Yi. Quasi-single field inflation and non-Gaussianities[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(4):-.
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