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题名: Fractional-chaotic inflation in the lights of PLANCK and BICEP2
作者: Gao, X ;  Li, TJ ;  Shukla, P
刊名: PHYSICS LETTERS B
出版日期: 2014
卷号: 738, 期号:-, 页码:412-417
关键词: SUPERGRAVITY
学科分类: Physics
DOI: 10.1016/j.physletb.2014.10.007
通讯作者: Gao, X (reprint author), Chinese Acad Sci, Kavli Inst Theoret Phys China KITPC, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
部门归属: [Gao, Xin
英文摘要: In the lights of current BICEP2 observations accompanied with the PLANCK satellite results, it has been observed that the simple single field chaotic inflationary models provide a good agreement with their spectral index n(s) and large tensor-to-scalar ratio r(0.15 < r < 0.26). To explore the other simple models, we consider the fractional-chaotic inflationary potentials of the form V-0 phi(a/b) where a and bare relatively prime. We show that such kind of inflaton potentials can be realized elegantly in the supergravity framework with generalized shift symmetry and a nature bound a/b < 4 for consistency. Especially, for the number of e-folding from 50 to 60 and some a/b from 2 to 3, our predictions are nicely within at least 1 sigma region in the (r-n(s)) plane. We also present a systematic investigation of such chaotic inflationary models with fractional exponents to explore the possibilities for the enhancement in the magnitude of running of spectral index (alpha(ns)) beyond the simplistic models. Published by Elsevier B. V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). Funded by SCOAP(3).
资助者: Natural Science Foundation of China [10821504, 11075194, 11135003, 11275246]; National Basic Research Program of China (973 Program) [2010CB833000]; Compagnia di San Paolo contract "Modern Application of String Theory" (MAST) [TO-Call3-2012-0088]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000344624900062
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15577
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Gao, X,Li, TJ,Shukla, P. Fractional-chaotic inflation in the lights of PLANCK and BICEP2[J]. PHYSICS LETTERS B,2014,738(-):412-417.
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