期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 8, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2009/08/008
关键词
non-gaussianity; cosmological perturbation theory
资金
- US Department of Energy [DEFG02-05ER41360]
- Chinese Academy of Sciences [KJCX3-SYW-N2]
- NSFC [10821504, 10525060, 10535060/A050207]
- NSF CAREER [PHY-0348093]
- DOE [DE-FG-02-95ER40896]
- Research Corporation
- University of Wisconsin
- John Simon Guggenheim Memorial Foundation Fellowship
- Ambrose Monell Foundation
- 973 project [2007CB815401]
- STFC [ST/F002998/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F002998/1] Funding Source: researchfish
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.
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