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题名: Primordial trispectrum from entropy perturbations in multifield DBI model
作者: Gao, Xian ;  Hu, Bin
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2009
期号: 8, 页码:-
关键词: NON-GAUSSIANITY ;  K-INFLATION
学科分类: Physics
通讯作者: Gao, X , Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, POB 2735, Beijing 100190, Peoples R China
部门归属: [Gao, X; Hu, B] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
英文摘要: We investigate the primordial trispectra of the general multifield DBI inflationary model. In contrast with the single field model, the entropic modes can source the curvature perturbations on the super horizon scales, so we calculate the contributions from the interaction of four entropic modes mediating one adiabatic mode to the trispectra, at the large transfer limit (T(RS) >> 1). We obtained the general form of the 4-point correlation functions, plotted the shape diagrams in two specific momenta configurations, "equilateral configuration" and "specialized configuration". Our figures showed that we can easily distinguish the two different momenta configurations.
资助者: Chinese Academy of Sciences[KJCX3-SYW-N2]; National Natural Science Foundation of China[10821504, 10525060]; NSFC[10821504, 10535060/A050207]; Ministry of Science and Technology 973 program[2007CB815401]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000270036800012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5273
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:
Gao, Xian,Hu, Bin. Primordial trispectrum from entropy perturbations in multifield DBI model[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2009(8):-.
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