Simplest extension of Starobinsky inflation

被引：24
|
作者：
van de Bruck, Carsten [1 ]
Paduraru, Laura E. [1 ]
机构：
[1] Univ Sheffield, Consortium Fundamental Phys, Sch Math & Stat, Sheffield S3 7RH, S Yorkshire, England
来源：
PHYSICAL REVIEW D | 2015年 / 92卷 / 08期
关键词：
MODELS; SUPERGRAVITY; FLATNESS; UNIVERSE; HORIZON;
D O I：
10.1103/PhysRevD.92.083513
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We consider the simplest extension to the Starobinsky model, by allowing an extra scalar field to help drive inflation. We perform our analysis in the Einstein frame and calculate the power spectra at the end of inflation to second order in the slow-roll parameters. We find that the model gives predictions in great agreement with the current Planck data without the need for fine-tuning. Our results encourage current efforts to embed the model in a supergravity setting.
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页数：7
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