Reinterpretation of the Starobinsky model

被引：15

作者：

Asaka, Takehiko ^{[1
]}

Iso, Satoshi ^{[2
,3
]}

Kawai, Hikaru ^{[4
]}

Kohri, Kazunori ^{[2
,3
]}

Noumi, Toshifumi ^{[5
,6
,7
]}

Terada, Takahiro ^{[8
,9
,10
,11
]}

机构：

[1] Niigata Univ, Dept Phys, Niigata 9502181, Japan

[2] High Energy Accelerator Res Org KEK, KEK Theory Ctr, Tsukuba, Ibaraki 3050801, Japan

[3] Grad Univ Adv Studies SOKENDAI, Tsukuba, Ibaraki 3050801, Japan

[4] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[5] RIKEN, Theoret Res Div, Nishina Ctr, Wako, Saitama 3510198, Japan

[6] Hong Kong Univ Sci & Technol, Jockey Club Inst Adv Study, Hong Kong, Hong Kong, Peoples R China

[7] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan

[8] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[9] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

[10] Asia Pacific Ctr Theoret Phys APCTP, Pohang 37673, South Korea

[11] KIAS, Seoul 02455, South Korea

来源：

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS | 2016年 / 2016卷 / 12期

基金：

新加坡国家研究基金会;

关键词：

4TH-ORDER GRAVITY; DYNAMICAL MODEL; INFLATION; SUPERGRAVITY; ANALOGY; LIGHT;

D O I：

10.1093/ptep/ptw161

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Starobinsky model of inflation, consistent with Planck 2015, has a peculiar form of the action, which contains the leading Einstein term R, the R-2 term with a huge coefficient, and negligible higher-order terms. We propose an explanation of this form based on compactification of extra dimensions. Once tuning of order 10(-4) is accepted to suppress the linear term R, we no longer have to suppress higher-order terms, which give nontrivial corrections to the Starobinsky model. We show our predictions of the spectral index, its runnings, and the tensor-to-scalar ratio. Finally, we discuss a possibility that quantum gravity may appear at the scale Lambda greater than or similar to 5 x 10(15) GeV.

引用

页数：11

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