General single field inflation with large positive non-Gaussianity

被引：42
|
作者：
Li, Miao [1 ]
Wang, Tower
Wang, Yi
机构：
[1] Univ Sci & Technol China, Interdisciplinary Ctr Theoret Studies, Hefei 230026, Anhui, Peoples R China
[2] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2008年 / 03期
关键词：
CMBR theory; cosmological perturbation theory; physics of the early universe;
D O I：
10.1088/1475-7516/2008/03/028
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Recent analysis of the WMAP three-year data suggests f(NL)(local) NL similar or equal to 86.8 in the WMAP convention. It is necessary to make sure whether general single. field inflation can produce a large positive fNL before turning to other scenarios. We give some examples to generate a large positive f(NL)(equil) in general single inflation. Our models are different from ghost inflation. Due to the appearance of non-conventional kinetic terms, f(NL)(equil) NL >> 1 can be realized in single. eld inflation.
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收藏
页数：21
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