期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 8, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2009/08/012
关键词
physics of the early universe; cosmological perturbation theory
资金
- 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]
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.
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