Large primordial trispectra in general single field inflation

被引：117

作者：

Chen, Xingang ^{[1
]}

Hu, Bin ^{[2
]}

Huang, Min-xin ^{[3
]}

Shiu, Gary ^{[4
,5
]}

Wang, Yi ^{[2
]}

机构：

[1] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

[2] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China

[3] CERN, Dept Phys, Div Theory, CH-1211 Geneva, Switzerland

[4] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[5] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2009年 / 08期

关键词：

non-gaussianity; cosmological perturbation theory; NON-GAUSSIANITY; PERTURBATIONS;

D O I：

10.1088/1475-7516/2009/08/008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the large scalar four-point correlation functions in general single field inflation models, where the inflaton Lagrangian is an arbitrary function of the inflaton and its first derivative. We find that the leading order trispectra have four different shapes determined by three parameters. We study features in these shapes that can be used to distinguish among themselves, and between them and the trispectra of the local form. For the purpose of data analyses, we give two simple representative forms for these "equilateral trispectra". We also study the effects on the trispectra if the initial state of inflation deviates from the standard Bunch-Davies vacuum.

引用

页数：31

共 64 条

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