Cosmological observables in multi-field inflation with a non-flat field space

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	Cosmological observables in multi-field inflation with a non-flat field space
	Gao, X ; Li, TJ ; Shukla, P
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2014
期号	10
关键词	inflation string theory and cosmology non-gaussianity
ISSN号	1475-7516
通讯作者	Gao, X (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.
中文摘要	Using delta N formalism in the context of a generic multi-field inflation driven on a non-flat field space background, we revisit the analytic expressions of the various cosmological observables such as scalar tensor power spectra, scalar/tensor spectral tilts, non-Gaussianity parameters, tensor-to-scalar ratio, and the various runnings of these observables. In our backward formalism approach, the subsequent expressions of observables automatically include the terms beyond the leading order slow-roll expansion correcting many of the expression at subleading order. To connect our analysis properly with the earlier results, we rederive the (well) known (single field) expressions in the limiting cases of our generic formulae. Further, in the light of PLANCK results, we examine for the compatibility of the consistency relations within the slow-roll regime of a two-field roulette poly-instanton inflation realized in the context, of large volume scenarios.
资助信息	Natural Science Foundation of China [10821504, 11075194, 11135003, 11275246]; National Basic Research Program of China (973 Program) [201003833000]; Compagnia di San Paolo contract "Modern Application of String Theory" (MAST) [TO-Ca113-2012-0088]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59183]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Gao, X,Li, TJ,Shukla, P. Cosmological observables in multi-field inflation with a non-flat field space[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2014(10).
APA	Gao, X,Li, TJ,&Shukla, P.(2014).Cosmological observables in multi-field inflation with a non-flat field space.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(10).
MLA	Gao, X,et al."Cosmological observables in multi-field inflation with a non-flat field space".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .10(2014).